Water Quality: Tonasket, WA

35 water systems • 7,047 people served

Multiple Health Violations
584
Total Violations
26
Health-Based Violations
35
Water Systems
7,047
Population Served

Water Quality Summary

Tonasket is served by 35 public water systems with a combined service population of 7,047 people, and has 584 EPA Safe Drinking Water Act violations on record. Critically, 26 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Tonasket's violation count is 260% above the national average for Washington. Contaminants associated with violations include Barium, E. coli, Haloacetic Acids, Lead, Selenium.

Contaminants Found

Barium

Increases blood pressure and causes cardiovascular effects with long-term exposure.

Common source: Natural rock deposits, oil drilling operations, coal power plant waste

EPA limit: 2 mg/L

E. coli

Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.

Common source: Fecal contamination from humans or animals entering the water supply

EPA limit: Zero (no E. coli permitted in drinking water)

Haloacetic Acids

Linked to increased cancer risk and potential reproductive and developmental effects with long-term exposure.

Common source: Reaction of chlorine disinfectants with organic matter in treated water

EPA limit: 0.060 mg/L (60 ppb)

Lead

Causes neurological damage, developmental delays in children, and kidney damage in adults even at low exposure levels.

Common source: Old plumbing pipes, lead solder, brass fixtures

EPA limit: Action Level: 0.015 mg/L (15 ppb)

Selenium

Hair loss, nail brittleness, and nervous system damage at elevated concentrations.

Common source: Natural geological deposits, mining discharges, oil refinery waste

EPA limit: 0.05 mg/L (50 ppb)

Water Systems Serving Tonasket

System Name PWSID Source Population Violations
TONASKET WATER SYSTEM WA5388700 Groundwater 2,392 3
INCHELIUM WATER DISTRICT WA5335550 Groundwater 540 12
CORRAL SPRINGS WATER SYSTEM WA5351714 Groundwater 336 3
PROGRESSIVE FLAT WATER ASSN WA5369650 Groundwater 335 2
Crane Ranch WA5315818 Groundwater 329 1
SANDFLAT WATER ASSOCIATION WA5309064 Groundwater 260 2
SUNCREST PLAT WATER SYSTEM WA5385207 Groundwater 260 4
COLEMAN BUTTE WATER ASSN WA5313940 Groundwater 250 1
LOOMIS WATER USERS ASSN INC WA5348200 Groundwater 225 3
HANSON HARBOR HOMEOWNERS ASSN WA5319928 Groundwater 220 3
AFC RANCH 1 WA5303427 Groundwater 217 0
RIVER ROAD MOBILE HOME PARK WA5317631 Groundwater 150 12
ASTON ESTATES WA5309066 Groundwater 141 2
AFC RANCH 2 WA5300863 Groundwater 125 0
CRUMBACHER ESTATES WATER SYSTEM WA5313916 Groundwater 111 1
MARTIN CREEK COMMUNITY ASSN WA5351877 Groundwater 108 14
HOMESTEAD MOBILE HOME PARK WA5301576 Groundwater 105 0
PINE FOREST WATER SYSTEM WA5367393 Groundwater 90 6
OLD ORCHARD ESTATES WATER SYSTEM WA5307748 Groundwater 86 0
LOST RIVER AIRPORT ASSOCIATION WA5348348 Groundwater 72 55
WOLF CREEK PROPERTY OWNERS ASSN WA5311476 Groundwater 71 6
PINECREST SUBDIVISON OWNERS WA5313909 Groundwater 63 1
CASCADE FOOTHILLS WA5307285 Groundwater 61 0
VISTA VUE WATER USERS ASSN WA5320226 Groundwater 60 3
WITHROW WATER WORKS WA5398000 Groundwater 60 8
APPLEWAY TRAILER COURT WA5300603 Groundwater 54 0
COLUMBIA SPRINGS ESTATES WA5304298 Groundwater 54 46
JOHNSON CREEK WATER USERS ASSN WA5339411 Groundwater 48 88
Robison Tract / Teeny WA5367605 Groundwater 46 0
RIVERWOOD WATER SYSTEM WA5373032 Groundwater 43 0
ELM TREE WATER & SEWER ASSN WA5323128 Groundwater 38 17
MANY LAKES MOBILE HOME PARK WA5304670 Groundwater 37 51
Valley View Estates Water System WA5306321 Groundwater 28 0
TWIN PINES MOBILE HOME PARK WA5331790 Groundwater 25 233
AZWELL ORCHARDS WA5303523 Groundwater 7 7

Concerned About Your Water?

A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.

Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.

Other Cities in Washington

Seattle 28 violations • 1,160,858 served Tacoma 477 violations • 628,246 served Vancouver 125 violations • 495,151 served Spokane 1010 violations • 426,660 served Kent 41 violations • 359,974 served Bellevue 1 violations • 317,330 served Everett 115 violations • 282,350 served Lynnwood 16 violations • 268,204 served

View all cities in Washington →

Data Sources

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.

Verify at epa.gov • Search ECHO for WA