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  3. /Contra Costa County
  4. /Oakley
CSASan Jose-San Francisco-OaklandMSASan Francisco-Oakland-Fremont#26/65 Population

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Environmental Reporti

Water Systemsi

13community / 21 total

Water Violationsi

76

Active NPDESi

3/ 14 total

Drinking Wateri

SDWIS

Public water systems registered to serve this area. Community systems (CWS) provide water to residents year-round. Transient systems serve places like gas stations or restaurants. Violations indicate a system failed to meet federal drinking water standards.

Community Systemsi

13

Active Systemsi

13

Recent Violationsi

76
Community (13)
Transient (6)
Non-Transient (2)

Recent Violations (Last 5 Years)

OAKLEY MUTUAL WATER COMPANY

18 violationsLatest: 2025-10-01
EPA

FOREST RANCH MOBILE PARK

15 violationsLatest: 2025-07-01
EPA

WILLOW PARK MARINA

20 violationsLatest: 2025-10-01
EPA

DUTCH SLOUGH WATER WORKS

2 violationsLatest: 2021-10-01
EPA

DELTA MUTUAL WATER COMPANY

21 violationsLatest: 2025-07-01
EPA

Historical Violations (Over 5 Years Ago)

CAMINO MOBILEHOME

1 violationLatest: 2017-01-01
EPA

BEACON WEST

40 violationsLatest: 2017-07-01
EPA

Wastewater & Stormwater Permits (NPDES)i

NPDES

Under the Clean Water Act, any facility that discharges wastewater or stormwater into rivers, lakes, or streams must hold an NPDES permit. "Effective" means the permit is currently active and the facility is authorized to discharge under its permit conditions.

Active Permitsi

3

Expired / Terminatedi

11
IRONHOUSE SD WWTP450 WALNUT MEADOWSBiosolids|EPA
IRONHOUSE SD WWTP450 WALNUT MEADOWSPOTW|EPA
SEGMENTS 3 & 4 CONTRA COSTA CANAL REPLACEMENT PROJECTCONTRA COSTA CANALMinor Discharge|EPA

Cleanup Sites (Brownfields)i

EPA Brownfields

Former industrial or commercial properties where contamination has been found. "Remedy Complete" means cleanup is finished. "Construction Complete" means cleanup infrastructure is built but monitoring continues. "In Progress" means the site is still being investigated or cleaned up.

WARDS AUTO SERVICE CENTER3850 MAIN STREETIn Progress|
FOUNDATION CONSTRUCTORS81 BIG BREAK RDIn Progress|
BAY AREA AUTO SALES5600 MAIN STREETIn Progress|
J & M ENTERPRISES5337 LIVE OAK AVENUEIn Progress|
DELTA SCRAP & SALVAGE1371 MAIN STREETIn Progress|
M J AUTOMOTIVE5780 MAIN STREETIn Progress|
A & M AUTO REPAIR; LOYDS ENGINEERING3780 MAIN STREETIn Progress|
CRUZ CONSTRUCTION3903 MAIN STREETIn Progress|
HARDCASTLE'S RV CENTER; FORMERLY BLY'S PRODUCE1189 MAIN STREETIn Progress|
FORMER PISSIGONI TOWING590-5904 MAIN STREETIn Progress|
CHEMOURS OAKLEY6000 BRIDGEHEAD RDConstruction Complete|EPA
SUBURBAN PROPANE, LLC30 DELTA RDIn Progress|
BILL'S AUTO & TRUCK REPAIR3960 MAIN ST #DIn Progress|
OAKLEY 1 HOUR DRY CLEANERS3647 MAIN STREETIn Progress|
PG&E CORP. YARD5400 NEROLY ROADIn Progress|
BAY AREA PALLET; BONANZA INDUSTRIAL SUPPLY1315 MAIN STREETIn Progress|
CUTINO'S FEED AND SUPPLY/CUTINO'S TIRE CENTER3770 MAIN STREETIn Progress|
CONTRA COSTA AUTO SALES3021 MAIN STREETIn Progress|
TRI COUNTY AUTO RECYCLERS5740 MAIN ST.In Progress|
CONTRA COSTA AUTO SALVAGE1731 MAIN STREETIn Progress|
COOK'S BATTERY139 HILL AVENUEIn Progress|