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.

Sequim, WA Water Quality, EPA Sites & Air Quality Data

Environmental Reporti

Water Systemsi

16community / 119 total

Water Violationsi

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

Non-Transient (23)

Community (16)

Transient (11)

Recent Violations (Last 5 Years)

CARLSBORG MOBILE ESTATES

2 violationsLatest: 2025-07-01

EPA

LOUELLA HEIGHTS

4 violationsLatest: 2025-07-01

EPA

PETERSON-WHITTAKER

1 violationLatest: 2025-07-01

EPA

OLYMPIC VIEW

1 violationLatest: 2025-07-01

EPA

MT. VISTA - DUNGENESS GOLF COURSE

4 violationsLatest: 2025-04-01

EPA

FOUR SEASONS PARK

3 violationsLatest: 2025-07-01

EPA

HEART O THE HILLS

2 violationsLatest: 2025-07-01

EPA

Parkwood MFD Housing Community

4 violationsLatest: 2025-07-01

EPA

SUN MEADOWS

3 violationsLatest: 2025-07-01

EPA

PANORAMA VISTA

3 violationsLatest: 2025-07-01

EPA

ESTATES INC

5 violationsLatest: 2025-01-01

EPA

Historical Violations (Over 5 Years Ago)

ALDERWOOD EAST

1 violationLatest: 2007-01-01

EPA

BEACH

7 violationsLatest: 2020-01-01

EPA

EV Charging & Alternative Fuel Stationsi

AFDC

Publicly listed alternative fuel and EV charging stations within the municipality. Data from the U.S. Department of Energy. "Open" stations are currently available for use; "Planned" stations are approved but not yet operational.

Total Stationsi

EV Stationsi

Level 2 Portsi

DC Fast Portsi

Blink NetworkChargePoint NetworkNon-NetworkedTeslaTesla Destination

GreenHouse Inn by the Bay - Tesla Destination630 Marine DrElectric2 L2Tesla Destination

Holiday Inn Express & Suites - Tesla Supercharger1441 E Washington StreetElectric8 DCTesla

Lost Mountain Lodge303 Sunny View DrElectric1 L2Non-Networked

Lost Mountain Lodge - Tesla Destination303 Sunny View DrElectric2 L2Tesla Destination

NOLS SQ EAST630 N Sequim AveElectric2 L2ChargePoint Network

NOLS SQ WEST630 N Sequim AveElectric2 L2ChargePoint Network

Nikola Broadband615 N 5th AveElectric1 L2Non-Networked

PNNL / MSL51529 W Sequim Bay RdElectric2 L2Non-Networked

PUD Lot on Govan St.150 N. Govan AveElectric2 L2Blink Network

The Co-op Farm and Garden216 E Washington StElectric1 L2Non-Networked

Wild Birds Unlimited275953 US-101Electric2 L2Non-Networked