What environmental databases are included?

This page aggregates data from eight EPA databases: Safe Drinking Water (SDWIS), Superfund/NPL sites, Toxic Release Inventory (TRI), Air Quality Index (AQI), Leaking Underground Storage Tanks (LUST), NPDES water discharge permits, RCRA hazardous waste, and Brownfields.

What does the Air Quality Index (AQI) mean?

AQI is measured on a scale from 0 to 500. Values under 50 are 'Good,' 51-100 is 'Moderate,' and above 100 is 'Unhealthy for Sensitive Groups.' AQI is measured at the county level since air quality monitoring stations are sparse. Your town shares its county's AQI reading.

What is a Superfund site?

A Superfund site is a location contaminated by hazardous waste that has been placed on the EPA's National Priorities List (NPL) for long-term cleanup. These sites pose serious risks to human health and the environment. Cleanup can take decades and cost hundreds of millions of dollars.

Concord, CA Water Quality, EPA Sites & Air Quality Data

CSASan Jose-San Francisco-Oakland MSASan Francisco-Oakland-Fremont#5/65 Population

Environmental Reporti

Water Systemsi

11community / 25 total

Water Violationsi

TRI Facilitiesi

Active NPDESi

1/ 33 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

Active Systemsi

Recent Violationsi

Transient (13)

Community (11)

Non-Transient (1)

Recent Violations (Last 5 Years)

BLACK BUTTE MOBILE H.P.

7 violationsLatest: 2022-01-01

EPA

RIVER RANCH MOBILE HOME PARK

4 violationsLatest: 2024-10-17

EPA

Historical Violations (Over 5 Years Ago)

WILLOW PASS MOBILE HOME *CL 1/07-INACTIV

1 violationLatest: 1993-07-01

EPA

MAPACHE TRAILER PARK

5 violationsLatest: 2016-07-01

EPA

LOCKEFORD MOBILE HOME PARK WTR SYS

2 violationsLatest: 2006-07-01

EPA

NORTH SIDE MOBILE HOME RANCH

4 violationsLatest: 2019-09-01

EPA

Toxic Release Inventory (TRI)i

TRI

Factories, refineries, and other industrial facilities that use or store hazardous chemicals are required to report their releases annually to the EPA. Being listed here does not mean a violation occurred — it means the facility is transparently tracking its chemical usage.

Reporting Facilitiesi

With Chemical Datai

MILITARY OCEAN TERMINAL CONCORD410 NORMAN AVE5 chemicals|TRI

SYSTRON DONNER2700 SYSTRON DR3 chemicals|TRI

CEMEX CONCORD3951 LAURA ALICE WAY2 chemicals|TRI

CALEX MFG CO INC2401 STANWELL DR1 chemical|TRI

PT SYSTEMS INC1980 OLIVERA RD, SUITE A1 chemical|TRI

SIEMENS MEDICAL SOLUTIONS USA4040 NELSON AVE1 chemical|TRI

ETCH-TEK ELECTRONICS INC2455 BATES AVE1 chemical|TRI

ADL CIRCUITS INC1081 SHARY CIRCLE|TRI

DELUXE CHECK PRINTERS INC2550 STANWELL DR|TRI

SBE INC2400 BISSO LN|TRI

MICROPUMP CORP1990 OLLVERA RD|TRI

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

Expired / Terminatedi

AMR CONCORD2400 BISSO LANEIndustrial Stormwater|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.

CONCORD NAVAL WEAPONS STATIONPORT CHICAGO HWYIn Progress|EPA

Superfund Sitesi

EPA Superfund

Superfund sites are the nation's most seriously contaminated locations. They are placed on the National Priorities List (NPL) and receive long-term federal cleanup funding. Most communities have none.

Concord Naval Weapons Station

NPL Site

EPA