Summary
What the comuna hasSource: OpenStreetMap
Buin es una comuna y ciudad chilena ubicada en la Región Metropolitana, en el sector sur de la conurbación de Santiago. Y perteneciente a la provincia de Maipo. Se encuentra a solo 35 km al sur de la capital regional, siendo posible acceder a la comuna directamente a través de la Ruta Panamericana o Autopista del Maipo, o por el km 27 de la Autopista Acceso Sur a Santiago sin mayores complicaciones. Integra junto con las comunas de Calera de Tango, Paine y San Bernardo el Distrito Electoral N° 30 y pertenece a la 7.ª Circunscripción Senatorial. Buin limita al norte con la comuna de San Bernardo, al este, con la comuna de Pirque, al sur, con la comuna de Paine, y al oeste, con la comuna de Isla de Maipo.
Liveability index · EIU style
54.7 /100AuthoritiesWho leads the comuna, its council, sessions and lobbying requests
Mayor · 2024-2028Source: DecideChile · SERVEL

Mayoral history · 8 terms
SERVEL · TRICEL (1992-2008) · DecideChile (2024) · Wikidata (pre-1992)
Concejo MunicipalSource: DecideChile · SERVEL
Concejo MunicipalSource: DecideChile · SERVEL
Sesiones
En una línea: El concejo aprobó 12 puntos de tabla —incluyendo la compra de vales de gas, obras en plaza y viviendas, y transacciones judiciales— mientras el debate más extenso giró en torno al incendio en empresa frigorífica del sector oriente y a graves irregularidades en la Corporación de Desarrollo Social.
Temas tratados
- Actas 73, 74 y 75: aprobadas sin observaciones.
- Plan Regulador Comunal: se informó el calendario de 4 jornadas de participación ciudadana temprana en distintas localidades.
- Inmobiliaria con deuda millonaria: concejal planteó deuda de más de $1.000 millones con el municipio y preguntó por el estado de las acciones judiciales.
- Incendio en empresa frigorífica (sector Buin Oriente): el alcalde informó acciones del COGRID, clases online para el Liceo 131, oficios a SEREMI, Fiscalía y Superintendencia de Medio Ambiente, y multa cursada.
- Corporación de Desarrollo Social: debate sobre irregularidades, directorio sin nombramiento válido por el concejo, auditoría forense en curso y ampliación de querella criminal.
Acuerdos y votaciones
- Vales de gas: aprobada adjudicación a Casco GLP S.A. por 5.500 vales de 15 kg, $115.637.060 IVA incluido. Unanimidad.
- Mobiliario urbano plaza Villarrica: aprobada adjudicación a Ritter SpA por $52.955.000, plazo 40 días. Unanimidad.
- Anticipo de subvención para retiro voluntario docente (María Cabrera, $7.677.343): aprobado. Concejal Silva se abstuvo (no queda claro en la transcripción).
- Independización uniones domiciliarias población Arturo Beal: aprobada adjudicación a Construcciones Silox por $76.592.840, plazo 120 días. Unanimidad.
- Nombre conjunto habitacional: aprobado dejar sin efecto nombre anterior y asignar "Pintor José Venturelli" (calle Bajo de Matte 01648). Unanimidad.
- Patente de alcohol clase C (restaurant, Caribou SpA, sector Guindos): aprobada. Concejal Calderón votó en contra.
- Traslado de patente de alcohol clase C (Entre Trenes SpA, de Linderos a Santa María 396): aprobado. Unanimidad.
- Tres transacciones judiciales (causas rol 82-2025, 66-2025 y 72-2025): aprobadas por un total aproximado de $18.750.000 en cuotas. Unanimidad en los tres casos.
- Proyecto CESOC en Alto Jaquel: aprobada autorización de intervención y compromiso de mantención. Unanimidad.
- Rebaja contrato Festival Teatro a Mil (obra suspendida por lluvia): aprobada reducción de $7.500.000, quedando en $37.500.000. Unanimidad.
Plata y obras
- Vales de gas: $115,6 millones (5.500 unidades, distribución en 8 localidades).
- Plaza Villarrica: $52,9 millones en mobiliario urbano.
- Independización de alcantarillado en 13 viviendas: $76,6 millones.
- Transacciones judiciales: ~$18,75 millones en total.
- Anticipo retiro voluntario docente: $7,67 millones.
- Auditoría corporación: presupuesto disponible de $35 millones (licitación publicada).
- Contrato Teatro a Mil reducido a $37,5 millones.
- Se mencionó contrato de $460 millones por trato directo (ampliación liceo) como parte de irregularidades bajo investigación —dato aportado por concejal, no confirmado oficialmente en sesión.
Puntos de debate o controversia
- Incendio empresa frigorífica: vecinos con olores insoportables, líquidos percolados a canal de regadío seco, clases online por imposibilidad de uso del Liceo 131. Concejales cuestionaron lentitud de respuesta de SEREMI y falta de información oportuna al concejo.
- Directorio de la Corporación: concejal Calderón documentó que dos directores fueron nombrados el 30 de abril por el alcalde sin acuerdo del concejo, contraviniendo dictamen de Contraloría citado en la propia acta. El alcalde comprometió someter nombres a votación antes del 29 de junio. Discusión sobre validez de actos ya adoptados por ese directorio.
- Auditoría corporación: concejales cuestionaron que la licitación publicada cubra solo finiquitos y no la corporación completa.
- Solicitud de audiencia pública de organización "Entre Paréntesis": sin respuesta desde el 8 de mayo; debate sobre procedencia según ordenanza vigente.
Para seguir
- Nombramiento de dos directores de la corporación por el concejo: plazo comprometido al 29 de junio.
- Comisión reservada con directora jurídica sobre estado de juicios contra inmobiliaria deudora.
- Ampliación de querella criminal contra la corporación: en trámite.
- Entrega de 5.500 vales de gas: fecha por definir una vez recibidos en bodega.
- Subvenciones pendientes (~17 organizaciones): pasan a comisión próximamente.
- Ordenanza de participación ciudadana actualizada: sin fecha definida.
- Regularización de redes sociales municipales y decreto de responsables: en proceso.
- Actividades por ordenanza de personas mayores (junio y octubre): en planificación.
- Paraderos en mal estado sector Alto Jaquel: oficio pendiente a Vialidad.
Summary generated by AI (claude-sonnet-4-6) from the official broadcast transcript · may contain inaccuracies
Official council minutesSource: CPLT · Active Transparency inventory (Law 20.285)
Official council minutesSource: CPLT · Active Transparency inventory (Law 20.285)
- 55 N° 53 · 2026 ↗
- 56 N° 53 · 2026 ↗
- 57 N° 53 · 2026 ↗
- 58 N° 53 · 2026 ↗
- 59 N° 53 · 2026 ↗
- 60 N° 53 · 2026 ↗
Documents indexed from the Transparency Portal (Law 20.285); they link to the PDF published by the municipality.
What the council resolvesSource: Official minutes · AI extraction (ongoing)
What the council resolvesSource: Official minutes · AI extraction (ongoing)
| Resolution | Type | Amount | Vote |
|---|---|---|---|
| 4.1 · Calificación como imprevisto u otras circunstancias debidamente calificadas para otorgar el trato directo del servicio de disposición final de residuos sólidos con la empresa Consorcio Santa Marta S.A. | Tender | — | — |
| 4.1 · Aprobar Reglamento actualizado de la Carrera Funcionaria del Personal de Salud | Regulation | — | unanimidad |
| 4.4 · Aprobar transacción extrajudicial con Servicios Agrícolas LAM SpA por $650,724 | Settlement | $650.724 | — |
| 4.3 · Aprobar transacción judicial con Guillermo Antonio Acuña Pezoa por $8,500,000 en cuatros cuotas mensuales | Settlement | $8.507.240 | — |
| 4.2 · Aprobar convenio de cooperación para el programa 'Quiero Mi Barrio' en las Villas Clotario Blest y Santa Rita | Tender | — | — |
| 4.1 · Asignar nombres de conjunto habitacional, calles y pasajes para el proyecto 'Barrio Nuevo El Carmen' | Other | — | unanimidad |
Resolutions voted by the council, automatically extracted from the official minutes (extraction ongoing: coverage grows as the 94.917 indexed minutes are processed). May contain reading errors; the official document is the municipality's PDF.
Comptroller auditsSource: CGR · Municipal Observatory
Comptroller auditsSource: CGR · Municipal Observatory
| Year | Findings | Altam. | Compl. | Median. | Reports |
|---|---|---|---|---|---|
| 2025 | 4 | — | 3 | 1 | 1 |
| 2024 | 9 | 6 | — | 1 | 1 |
| 2021 | 38 | 16 | 17 | 5 | 2 |
| 2020 | 3 | — | 2 | 1 | 1 |
| 2019 | 33 | 9 | 8 | 14 | 3 |
| 2018 | 59 | 28 | 7 | 24 | 3 |
CGR severity classification · audit findings on the municipality and its corporations
Who requests meetings with the municipalitySource: InfoLobby · CPLT (Law 20,730)
Who requests meetings with the municipalitySource: InfoLobby · CPLT (Law 20,730)
- cmConstructora Metropolitana S.A.Lobby / interest management · 56 audiencias · 2019–2024
- IGInmobiliaria Galilea Centro SpALobby / interest management · 46 audiencias · 2019–2024
- IJInmobiliaria Jp S.A.Lobby / interest management · 27 audiencias · 2017–2026
- IBInmobiliaria Buin S.A.Lobby / interest management · 19 audiencias · 2017–2022
- IeInmobiliaria e Inversiones Augusta Ltda.Lobby / interest management · 13 audiencias · 2018–2024
- IPInmobiliaria Parque Buin S.A.Lobby / interest management · 12 audiencias · 2020–2022
- IAInmobiliaria Angostura SpALobby / interest management · 11 audiencias · 2021–2022
- IPInmobiliaria Py S.A.Lobby / interest management · 10 audiencias · 2015–2024
- SISinergía Inmobiliaria S.A.Lobby / interest management · 9 audiencias · 2018–2024
- PCProyecto Colaborativo el Roble SpALobby / interest management · 8 audiencias · 2021–2024
- FBFotovoltaica Boldo SpALobby / interest management · 8 audiencias · 2021–2022
- IVInmobiliaria Vigo SpALobby / interest management · 8 audiencias · 2017–2019
- FIFundacion InvicaLobby / interest management · 8 audiencias · 2020–2023
- WCWalmart Chile S.A.Lobby / interest management · 7 audiencias · 2016–2022
- CSCarran S.A.Lobby / interest management · 7 audiencias · 2019–2023
- ECEmpresa Constructora Agua Santa S.A.Lobby / interest management · 6 audiencias · 2019–2025
- SASociedad Anonima Viña Santa RitaLobby / interest management · 6 audiencias · 2023–2024
- PCPj Chile SpALobby / interest management · 6 audiencias · 2019–2020
- GSGranada SpALobby / interest management · 6 audiencias · 2021–2023
- IEInmobiliaria e Inversiones Cugat Ltda.Lobby / interest management · 6 audiencias · 2020–2024
Organisations that registered Lobby Law meetings with this municipality. Registering the meeting is mandatory for the official, so the list shows who asked to be heard, not whether they got anything.
PopulationWho lives here, how they study, their healthcare and more
Population and living conditionsSource: INE · CENSO · MINEDUC · ADIS
Population trend
How it has changedSource: Official INE series 2002–2026 (2017 base).
See the full trajectory to 2050 →INE projects comuna population only through 2035; the 2050 values are an own estimate by the monitor, anchored to the official INE 2050 national total (21,626,079 inhab, 32.1% aged 60+). Not an official comuna figure.
| Indicator | Value | Source |
|---|---|---|
| Homes with public water supply (2017 Census) | 95,01 % | CENSO 2017 2017 |
| School disengagement (leaves the system) | 1,8 % | MINEDUC 2023 |
| School enrollment | 1.230 students | MINEDUC · aggregated by hexagons 2024 |
| Municipal enrollment | 31,3 % | MINEDUC · aggregated by hexagons 2024 |
| PAES reading comprehension (DEMRE) | 594,1 pts | DEMRE · MINEDUC datos abiertos 2026 |
| PAES mathematics M1 (DEMRE) | 617,9 pts | DEMRE · MINEDUC datos abiertos 2026 |
| poblacion_censo | 116.969 inh. | 2024 Census 2024 |
| Income poverty (CASEN 2022) | 4,4 % | CASEN 2022 · SAE Observatorio MDSF 2022 |
| Pobreza multidimensional (CASEN 2022) | 19,1 % | CASEN 2022 · SAE Observatorio MDSF 2022 |
| Indigenous peoples | 6,52 % | 2024 Census 2024 |
The PAES year is that of the admission process: the test is sat in November of the previous year. The average covers only those who registered to apply to university —not every secondary-school graduate— and groups them by the comuna of the school they graduated from, not by where the student lives. Here it rests on 1.622 students registered for the PAES.
Registro Social de Hogares
| Elderly (60+) | 18.546 | 18% |
| Children and adolescents (<18) | 25.514 | 24% |
| Foreign nationals | 4.917 | 5% |
| Belonging to indigenous peoples | 4.830 | 5% |
| People with moderate/severe dependency | 1.606 | 2% |
| Single-person households | 27.131 | 49% |
A monthly administrative snapshot of the Social Household Registry (self-registration to access benefits), as of abril 2026. The "bracket 40" is the socioeconomic rating of the most vulnerable 40%. It is a registry, not a survey: it complements CASEN (biennial) with fresh data, but well-off comunas under-register. Source: ADIS, Ministry of Social Development and Family.
School educationSource: MINEDUC Open Data 2025
Aggregate of all the comuna's schools (RBD → comuna). Pass/withdrawal and attendance are from the 2025 school year. SIMCE is not published as open data (managed by the Quality Agency, by request only); the available quality proxy is passing, dropout and attendance. The PAES result appears in the social section.
Municipal healthcare (primary care)Source: SINIM · MINSAL / FONASA
Specialties with services recorded at the comuna's public facilities (REM DEIS, 2024). These are services performed, not doctor headcount. Excludes the private network.
REM-26 section A (DEIS/MINSAL): comprehensive family visits, summed across the comuna's facilities. The last year is partial while DEIS consolidates monthly reports.
| Center | Type | Provider type | Enrollees | % brackets A-B |
|---|---|---|---|---|
| Centro de Salud Familiar Héctor García | Family Health Center (CESFAM) | Municipal | 44.165 | 54% |
| Centro de Salud Familiar Maipo | Family Health Center (CESFAM) | Municipal | 17.196 | 58% |
| Centro de Salud Familiar Alto Jahuel | Family Health Center (CESFAM) | Municipal | 10.741 | 56% |
| Posta de Salud Rural Linderos | Community Family Health Center (CECOSF) | Municipal | 7.083 | 57% |
| Centro Comunitario de Salud Familiar Dr. Héctor García | Community Family Health Center (CECOSF) | Municipal | 6.950 | 59% |
| Posta de Salud Rural Viluco | Rural Health Post (PSR) | Municipal | 5.654 | 62% |
| Posta de Salud Rural Valdivia de Paine | Rural Health Post (PSR) | Municipal | 3.744 | 66% |
| Posta de Salud Rural los Morros | Rural Health Post (PSR) | Municipal | 3.196 | 58% |
| Posta de Salud Rural el Recurso | Rural Health Post (PSR) | Municipal | 1.623 | 63% |
FONASA brackets A-B ≈ lowest incomes (A: without resources). Source: FONASA, as of Dec 31, 2025, DEIS code.
Indigenous peoplesSource: 2024 Census (INE) · CONADI via IDE SMA
| People | People | % of total |
|---|---|---|
| Mapuche | 7.100 | 93.1% |
| Diaguita | 192 | 2.5% |
| Aymara | 135 | 1.8% |
| Quechua | 64 | 0.8% |
| Otro | 54 | 0.7% |
2024 Census: people who consider themselves as belonging to an indigenous people (small counts are suppressed for confidentiality at the source and not shown). Communities: CONADI national registry as of March 2024 — Araucanía and Los Lagos not refreshed in that update, the count is a floor. Land grants: 2022 registry.
Community organizationSource: RPJSFL Civil Registry (Law 20.500/19.418) · as of Jun 2026
All the comuna's active non-profit legal entities (Law 20.500 / 19.418), classified by organization name. It portrays the civil fabric: not just neighborhood councils, also committees, sports clubs, cultural and elderly groups, foundations and fire brigades.
5 Local media · 3 Comunitaria · 2 FMSource: SUBTEL · broadcasting licences · Regional Media Survey (MSGG)
5 Local media · 3 Comunitaria · 2 FMSource: SUBTEL · broadcasting licences · Regional Media Survey (MSGG)
| Local media | Type | dial |
|---|---|---|
| AFAMANDA FM | FM | 94.9 FM |
| CCARAMELO | FM | 103.7 FM |
| ACAgrupacion Cultural y Folclorica Compaces de Maipo · holder | Comunitaria | 107.5 FM |
| ACAgrupacion Cultural y Social Nueva Era 2000 · holder | Comunitaria | 106.3 FM |
| CdClub de Amigos de la Cueca · holder | Comunitaria | 107.1 FM |
The dial (frequency) of every FM, AM and community radio with a studio in the comuna (SUBTEL, active sound broadcasting concessions). National networks appear in their headquarters' comuna, not necessarily where they broadcast. When SUBTEL records no brand name, its holder (the concession holder).
Foreign-born populationSource: 2024 Census · INE
International immigrants per the 2024 Census (people born outside Chile living in the comuna). Nationwide they are 1,608,650 people, 8.8% of the population.
Housing and housing deficitSource: MINVU (Encampment Registry + 2024 Census deficit + subsidies) · INE
Encampments: MINVU National Registry 2024 (irregular settlements and the families living in them). Quantitative deficit: homes missing per the 2024 Census (doubling-up + unrecoverable overcrowding). Permits: new homes authorized by the Works Directorate in 2024 (INE) — measures future construction, not stock. Subsidies: MINVU by application comuna — DS49 accrues beneficiaries by resolution year; DS01 and DS52 accrue payments by application cohort (national totals in the source file differ ~1–6% from the comuna sum; the comuna series is published).
What the homes are like
Housing type: 2017 Census · tenure: 2002 Census (INE).
Elderly careSource: Chile Cuida · National Assets / SENAMA
Elderly careSource: Chile Cuida · National Assets / SENAMA
Long-stay facilities for the elderly registered in Chile Cuida. Comunas without ELEAM send their elders to other comunas. With projected ageing (see Demographic projection), this capacity defines whether one can age in one's own comuna.
ResourcesBudget, spending, municipal procurement and more
Budget and revenue sourcesSource: SINIM · SUBDERE
Ingreso total y desglose de ingresos propios
Total revenue · trend (2001–2025)
Own revenue breakdown (IPP) · 2025
Special-law revenues · 2025
Distributed by law to specific comunas; they arrive via transfers.
Revenue by sector · 2025
Municipal Common Fund balance · 2025
Evolución por fuente de ingreso
Permanent own revenue (IPP) · trend
FCM received · trend
State transfers · trend
Municipal spending and budget executionSource: SINIM · SUBDERE
Municipal spending and budget executionSource: SINIM · SUBDERE
Accrued spending · trend
Distribution by management area · 2025
What the budget is spent on · 2025
| Spending line | Amount | % of spending | |
|---|---|---|---|
| Municipal healthcare (primary care) · comuna health-sector spending | $20.703.798.000 | 43.2% | |
| Transfers to health | $19.582.392.000 | 40.8% | |
| Goods and services (operations) · supplies, contracts, maintenance | $9.051.699.000 | 18.9% | |
| Municipal personnel · municipal wages and fees | $6.822.314.000 | 14.2% | |
| Cleaning, garbage and landfills · waste collection and disposal | $3.579.199.000 | 7.5% | |
| Transfers to education | $1.264.370.000 | 2.6% | |
| Electricity (facilities) | $1.254.254.000 | 2.6% | |
| Investment (works and projects) | $682.449.000 | 1.4% | |
| Water (facilities) | $368.293.000 | 0.8% | |
| Street lighting | $226.624.000 | 0.5% | |
| Councillor stipends | $110.724.000 | 0.2% | |
| Travel allowances | $5.023.000 | 0.0% | |
| Commissions and representation | $2.638.000 | 0.0% |
Share of total accrued spending. Lines overlap (personnel sits inside several areas), so they don't add to 100%. Source: SINIM.
Personal y dotación municipal
Spending composition · 2025
Personnel by contract type · 2025
Municipal headcount · 2023
Municipal staff by contract status (SINIM, 2023). Cost per staffer = annual spending of the type ÷ same-year headcount.
Inversión, servicios básicos y obras
Investment and authorities' expenses · 2025
Basic and general services · 2025
Final works approvals (DOM) · per year
Building permits issued · per year
What it buys · Mercado PúblicoSource: ChileCompra · open data
Open profile in Monitor Mercado Público ↗
What it buys · Mercado PúblicoSource: ChileCompra · open data
Purchase-order amount · trend
| Top suppliers | Amount | POs |
|---|---|---|
| Dimension S.A. | $10.005.936.103 | 75 |
| Ingenieria y Construccion Mtv SpA | $3.158.997.050 | 1 |
| Constructora Lima | $2.895.469.676 | 1 |
| Crecer SpA | $2.050.608.025 | 22 |
| Ingenieria y Construccion Ricardo Rodriguez y Cia Ltda. | $2.030.575.192 | 116 |
| Genco S.A. | $2.027.861.136 | 27 |
| Servicios de Seguridad Arte Security Limitada | $1.299.003.511 | 43 |
| Empresa Constructora Santa Elena Ltda. | $1.198.420.083 | 1 |
Purchase mechanism · 2026
| Tender | $2.976.854.660 | 55% |
| Direct award discretionary | $1.613.365.947 | 30% |
| Agile Purchase | $458.871.792 | 9% |
| Framework Agreement | $343.166.381 | 6% |
Companies and economic activitySource: SII · company statistics and roster (domicile/HQ)
Pyramid by sales bracket
Largest companies domiciled in the comuna
| Company | Line of business | Sales bracket | Workers |
|---|---|---|---|
| Aconcagua Foods S.A. | INDUSTRIA MANUFACTURERA | Large 4 (>1M UF) | 2.820 |
| Corp de Desarrollo Social de Buin | COMERCIO AL POR MAYOR Y AL POR MENOR; REPARAC | Large 4 (>1M UF) | 2.119 |
| Metalpren Chile SpA | INDUSTRIA MANUFACTURERA | Large 4 (>1M UF) | 277 |
| Molino Linderos S a | INDUSTRIA MANUFACTURERA | Large 4 (>1M UF) | 99 |
| Agrofruta Sociedad Anonima | COMERCIO AL POR MAYOR Y AL POR MENOR; REPARAC | Large 4 (>1M UF) | 35 |
| Gestion de Exportaciones Fruticolas S.A. | COMERCIO AL POR MAYOR Y AL POR MENOR; REPARAC | Large 4 (>1M UF) | 11 |
| Cv Trading S.A. | COMERCIO AL POR MAYOR Y AL POR MENOR; REPARAC | Large 4 (>1M UF) | 3 |
| Agricola Convento Viejo SpA | AGRICULTURA, GANADERIA, SILVICULTURA Y PESCA | Large 3 | 245 |
| Diana Food Chile SpA | INDUSTRIA MANUFACTURERA | Large 3 | 122 |
| Friofort S a | TRANSPORTE Y ALMACENAMIENTO | Large 3 | 101 |
SII roster of legal entities (public). Due to tax secrecy sales come in brackets, never amounts. The comuna is that of the domicile/HQ: operations may be elsewhere.
Investment in SEIA projects
Investment DECLARED by the owner upon entering SEIA (not necessarily materialized; the RCA expires after 5 years without works). Multi-comuna projects: prorated investment, jobs counted in full. Jobs = declared peak labor (source PRISMA/SOFOFA). Source: e-SEIA + PRISMA.
TerritoryClimate, biodiversity, national heritage, SEIA-approved projects and more
Roads and motorwaysSource: OpenStreetMap · 2026 snapshot
Road infrastructure of the MOP and concession holders, not the municipality: it measures how much highway crosses the territory, not municipal management. Only comunas with roads of this category are counted.
Environment and air qualitySource: MMA · SINCA + PPDA + RETC
No air monitoring station (SINCA) in the comuna.
Zone with decontamination plan PPDA Region Metropolitana de Santiago · critical pollutant MP2.5 / MP10 / O3
Air quality observed at MMA's SINCA stations within the comuna (2020); when there are several, the worst is shown. The scale compares the annual average with the WHO 2021 guideline (PM2.5 = 5 · PM10 = 15 µg/m³, international health reference) and the Chilean annual primary standard (PM2.5 = 20 · PM10 = 50 µg/m³): green within the WHO guideline, amber between guideline and standard, red above the national standard. "Days above standard" use the 24-h daily standard (PM2.5 = 50 · PM10 = 150 µg/m³). RETC emissions = declared point sources (industry/energy), excludes diffuse sources like residential firewood.
Biodiversity and protected areasSource: SNASPE · SEIA baselines
Species of flora, fauna and funga documented in the baselines of the projects evaluated by SEIA in the comuna — what their environmental studies recorded in the territory. Conservation status (RCE/IUCN) and Chilean endemism are flagged.
CR critically endangered · EN endangered · VU vulnerable · NT near threatened (Species Classification Regulation / IUCN). ★ endemic to Chile. Extracted from SEIA studies by kingdom; presence reflects what baselines characterized, not a census.
26 Wetlands · 2 urban · 1.460 haSource: National Wetlands Inventory · SIMBIO (MMA)
26 Wetlands · 2 urban · 1.460 haSource: National Wetlands Inventory · SIMBIO (MMA)
| Code | Wetland | Hectares |
|---|---|---|
| HUR-13-01 | Sist. Rios Maipo- Mapocho, esteros Colina- Angostura- Puangue y Trib.urban | 1.426 /18.814 |
| HRU-13-38 | Buin 11 | 3 |
| H-13-48 | Tranque Las Delicias | 3 |
| HRU-13-28 | Buin 1 | 2 |
| H-13-30 | Tranque El Recurso | 2 |
| HRU-13-33 | Buin 6 | 2 |
| HRU-13-29 | Buin 2 | 2 |
| HRU-13-42 | Buin 13 | 2 |
| HRU-13-35 | Buin 8 | 2 |
| HRU-13-46 | Buin 17 | 1 |
| HRU-13-37 | Buin 10 | 1 |
| HRU-13-51 | Buin 21 | 1 |
+ 14 more wetlands
Area = hectares of wetland within the comuna boundary (apportioned using the DPA table of each record). For wetlands shared between comunas, "portion / total" is shown. "Urban" = urban wetland (HUR code). Official source migrated to the SBAP (Law 21,600).
Large projects approved by SEIASource: SEIA · approved projects
Projects with an environmental permit (RCA) approved by SEIA and declared investment above US$ 10 million, located in the comuna according to the case file and grouped by sector. Every sector with at least one project is listed: this is not a ranking or a selection. 51 projects totaling US$ 1.226 million, approved between 1997 and 2026. When a project spans several comunas, its investment is split among them.
Approved is not the same as built or operating: the RCA authorises the project, but some were never carried out and others have since closed.
Source: projects with an RCA approved by SEIA (investment declared by the developer, split among the comunas the project spans). Under each sector are its two largest projects by investment. It is the best public proxy for large industrial sites; SERNAGEOMIN’s registry of active mining operations (by mineral and type of operation) is a layer not yet incorporated.
Basic utilitiesSource: SISS · CNE · MINEDUC
Almost no comuna has its own utility: it is served by a major regional concession holder. Water = urban operational territory (SISS; rural goes via APR); electric = concession distributor per the tariff decree (CNE); higher education = university, IP and CFT campuses (MINEDUC/SIES), with the nearest comuna when there are none.
Environmental conflictsSource: SNIFA · SMA + Environmental Search · Environmental Courts
Final SMA sanctions
| Sanctioned entity | Auditable unit | Category | Fine (UTA) |
|---|---|---|---|
| Aconcagua Foods S.A. ↗ | ACONCAGUA FOODS-BUIN | Agroindustry | 190 |
| Valbifrut S.A. ↗ | VALBI LTDA. (PLANTA PROCESADORA DE NUECES) - BUIN | Agroindustry | 106 |
| Marcela Andrea Raggi Morales ↗ | GIMNASIO MARCELA RAGGI | Amenities | — |
| Jane Ramirez Araya ↗ | LEÑERÍA BALMACEDA 965 BUIN | Amenities | — |
Environmental sanctions final from the SMA (no pending appeals) whose auditable unit sits in the comuna: companies, individuals and institutions (including the municipality). Fine in UTA (Annual Tax Unit). Source: Public Sanctions Registry, SNIFA.
Appeals before the Environmental Courts
| Case no. | Parties / project | Subject | Decision |
|---|---|---|---|
| 23085-2018 ↗ 2TA | Farías Piña, Belisario Antonio en contra de la Directora Regional del Servicio de Evaluación Ambiental (Res. Ex. N° 584/2016). Centro Logístico Puerto Viluco | Administrative invalidation | Rejects |
| 28207-2018 ↗ 2TA | Carrera Aranguiz Dandy Arturo y Otros / Servicio de Evaluación Ambiental (Res. Ex. N° 1386/2016 de 29 de noviembre de 2016). Centro Logístico Puerto Viluco | Environmental assessment - Citizen participation | Partially upheld |
Appeals resolved by the Environmental Courts (Law 20.600) on the comuna's projects or facilities, geolocated by the associated project (SEIA) or sanctioned facility (SMA). Partial coverage: Supreme Court appeals and cases without a locatable act are excluded. Source: 1st Environmental Court's Environmental Search.
Green areasSource: SINIM · SUBDERE (2025)
Green areasSource: SINIM · SUBDERE (2025)
Municipally maintained green area per inhabitant (SINIM). The National Urban Development Council recommends a minimum of 10 m²/inhab (WHO, ~9). Self-reported by municipalities, with quality varying across comunas.
National heritageSource: National Monuments Council (Feb 2026)
National heritageSource: National Monuments Council (Feb 2026)
Monuments declared by decree (official CMN roster). Excludes archaeological and public monuments. Declaration entails legal protection and intervention restrictions.
Territorial burdensSource: SUBDERE (waste, Jun 2023) · Gendarmería (Jun 2025) · SISS (WWTP)
Territorial burdensSource: SUBDERE (waste, Jun 2023) · Gendarmería (Jun 2025) · SISS (WWTP)
Infrastructure this comuna carries — often serving others.
| Facility | Type | Detail |
|---|---|---|
| PTAS - BUIN - MAIPO | PTAS · sbr | AGUAS ANDINAS S.A. · discharges into río maipo |
| PTAS - ESTACIÓN BUIN | PTAS · lodos activados | AGUAS SAN PEDRO S.A. · discharges into canal paine |
| PTAS-VALDIVIA DE PAINE | PTAS · primario + desinfección | AGUAS ANDINAS S.A. · discharges into río angostura |
Official registries: they exclude illegal dumps and rural WWTPs (no consolidated public registry).
Forest firesSource: CONAF · Occurrence and damage statistics (2023-2024)
Occurrence and area affected by wildfires (CONAF). The 5-season cumulative gives a fairer picture than a single year: fire is episodic and big catastrophes concentrate in few seasons. The area is comuna-wide, not just urban.
Winter riskSource: SENAPRED · winter critical points 2026 (via FAU U. de Chile)
Points in the comuna where SENAPRED identifies winter-rain risk (channel overflows, flooding, collector collapse, landslides, mudflows, snow), with risk level and the agency responsible for the fix.
Water scarcitySource: DGA · MOP (scarcity-zone decrees)
DGA water-scarcity zone decrees (by comuna, province or region; basin decrees are not counted here, so chronicity is a floor). The decree enables extraordinary water redistribution measures. At the megadrought's peak (2021) 286 comunas were under decree; today 26.
Climate and climate changeSource: ARClim · MMA + CR2/UC (CMIP6 modeling)
Modeled climatology (CMIP6 downscaling ~5 km): present ≈ 1980-2010, projection ≈ 2035-2065 middle scenario. Not recent weather observation.
SafetyCrime, road crashes and municipal security infrastructure
Crimes (police cases)Source: CEAD · Ministry of Public Security
| Crime | Cases | Rate/100k |
|---|---|---|
| Threats | 975 | 826 |
| Property damage | 777 | 659 |
| Domestic violence | 680 | 576 |
| Larceny | 436 | 370 |
| Burglary of an inhabited place | 363 | 308 |
| Minor injuries | 343 | 291 |
| Theft of items from vehicles | 301 | 255 |
| Robbery with violence or intimidation | 279 | 237 |
| Burglary of an uninhabited place | 265 | 225 |
| Alcohol and drug use in public spaces | 212 | 180 |
| Motor vehicle theft | 158 | 134 |
| Weapons-related crimes | 153 | 130 |
Showing the 12 crimes with most cases of 29.
Police cases (reports + arrests) recorded by Carabineros and PDI. Not victimization (ENUSC measures the real figure, higher due to underreporting). The rate uses INE 2024 population. Source: CEAD, Ministry of Public Security.
What the municipality does
Municipal security infrastructure and staff declared to SINIM (since 2016). Excludes Carabineros and PDI, which are national.
Road crashesSource: CONASET · Data Observatory (2024)
Crashes georeferenced by CONASET (urban + highway) during 2024. The only per-comuna source; covers ~70% of the country's deaths (non-geolocatable ones are excluded), so it slightly underestimates the total. Pedestrian collision is the leading cause of pedestrian death.