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.

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

CSALos Angeles-Long Beach MSALos Angeles-Long Beach-Anaheim#29/122 Income

Environmental Reporti

Water Systemsi

1community / 3 total

Water Compliancei

Clean

TRI Facilitiesi

Active NPDESi

1/ 37 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 (2)

Community (1)

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

ALATUS AEROSYSTEMS20415 EAST WALNUT DRIVE NORTH4 chemicals|TRI

BULK TRANSPORTATION WALNUT FACILITY415 S LEMON AVE1 chemical|TRI

CEMEX CONSTRUCTION MATERIALS LP20903 CURRIER RD1 chemical|TRI

DFL WAREHOUSE20595 E BUSINESS PKY1 chemical|TRI

HOLLIDAY ROCK- INDUSTRY711 FAIRWAY DR1 chemical|TRI

LIBBEY GLASS INC200 OLD RANCH RD|TRI

NORRIS PLUMBING FIXTURES700 FAIRWAY DR|TRI

EVEREST ROOFING PRODS420 S LEMON|TRI

ANCHOR SWAN INC20405 E WALNUT DR N|TRI

EVANS ADHESIVE CORP260 PASEO TESORO|TRI

AZTEC WASHER CO INC20520 WALNUT DR|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

COMMAND DELIVERY SYSTEM20935 CURRIER RDIndustrial Stormwater|EPA

Nearest Hazardous Waste Disposal Facilitiesi

RCRA

These are the closest licensed facilities where hazardous waste (chemicals, solvents, industrial byproducts) can be legally treated, stored, or disposed of.

VEOLIA ES TECHNICAL SOLUTIONS, L.L.C.AZUSA7.4 mi|EPA

QUEMETCO INCINDUSTRY7.4 mi|EPA

INDUSTRIAL WASTE UTILIZATION INCMONTCLAIR10 mi|EPA

SAFETY-KLEEN SYSTEMS, INC.EL MONTE11 mi|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.

TITECH INTERNATIONAL (WOHL PROPERTY)4000 VALLEY BLVDIn Progress|EPA