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CHELAN CO PUD1 - Peshastin

PWS ID: WA5367050 · Washington

CHELAN CO PUD1 - Peshastin serves 1,397 people in Washington using Groundwater water sources. It has 74 recorded EPA violations, including 9 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CHELAN CO PUD1 - Peshastin

CHELAN CO PUD1 - Peshastin is a local-owned community water system that delivers drinking water to 1,397 residents in Washington (Chelan County) through 283 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 74 total violations for this system , of which 9 (12%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 59 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 8 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Washington, EPA tracks 4,557 public water systems serving 9,736,844 people, with 314,648 cumulative violations and 20,590 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 69 violations. CHELAN CO PUD1 - Peshastin's 74 violations sit above the Washington average. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,397
Total Violations
74
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
283
County
Chelan
School/Daycare
No
MCL Violations
9
Monitoring Violations
59
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 8 2004
Consumer Confidence Rule Other 5 2023
Nitrate MR 4 2014
Pentachlorophenol MR 4 2002
Coliform (TCR) MR 3 2004
Heptachlor epoxide MR 2 2002
Dinoseb MR 2 2002
Atrazine MR 2 2002
Simazine MR 2 2002
Toxaphene MR 2 2002
Heptachlor MR 2 2002
HEXACHLOROBENZENE MR 2 2002
Dalapon MR 2 2002
Di(2-ethylhexyl) phthalate MR 2 2002
Benzo(a)pyrene MR 2 2002
Di(2-ethylhexyl) adipate MR 2 2002
Hexachlorocyclopentadiene MR 2 2002
LASSO MR 2 2002
BHC-GAMMA MR 2 2002
Methoxychlor MR 2 2002
2,4,5-TP MR 2 2002
Picloram MR 2 2002
Endrin MR 2 2002
Chlordane MR 2 2002
Revised Total Coliform Rule MCL 1 2017
Total Haloacetic Acids (HAA5) MR 1 2021
Barium MR 1 1979
Gross Alpha, Excl. Radon and U MR 1 1979
Mercury MR 1 1979
Arsenic MR 1 1979

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for CHELAN CO PUD1 - Peshastin.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID WA5367050 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Washington Drinking Water Authority

Washington State Department of Health — Office of Drinking Water is the primacy agency that licenses and inspects CHELAN CO PUD1 - Peshastin under EPA-delegated authority.

Open WA regulator portal

Source: Washington State Department of Health — Office of Drinking Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2023 Consumer Confidence Rule Other 5 SDWIS / WA5367050 / 7000
2021 Total Haloacetic Acids (HAA5) MR 1 SDWIS / WA5367050 / 2456
2021 TTHM MR 1 SDWIS / WA5367050 / 2950
2017 Revised Total Coliform Rule MCL 1 SDWIS / WA5367050 / 8000
2014 Nitrate MR 4 SDWIS / WA5367050 / 1040
2004 Coliform (TCR) MCL 8 SDWIS / WA5367050 / 3100
2004 Coliform (TCR) MR 3 SDWIS / WA5367050 / 3100
2002 Pentachlorophenol MR 4 SDWIS / WA5367050 / 2326
2002 Heptachlor epoxide MR 2 SDWIS / WA5367050 / 2067
2002 Dinoseb MR 2 SDWIS / WA5367050 / 2041
2002 Atrazine MR 2 SDWIS / WA5367050 / 2050
2002 Simazine MR 2 SDWIS / WA5367050 / 2037
2002 Toxaphene MR 2 SDWIS / WA5367050 / 2020
2002 Heptachlor MR 2 SDWIS / WA5367050 / 2065
2002 HEXACHLOROBENZENE MR 2 SDWIS / WA5367050 / 2274

How CHELAN CO PUD1 - Peshastin Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric CHELAN CO PUD1 - Peshastin Washington avg Federal benchmark
Total violations 74 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 9 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 39.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,397 2,137 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 4,557 regulated public water systems in Washington.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CHELAN CO PUD1 - Peshastin water safe to drink? ▼
CHELAN CO PUD1 - Peshastin (PWS ID: WA5367050) has 74 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,397 people using Groundwater sources.
How many people does CHELAN CO PUD1 - Peshastin serve? ▼
CHELAN CO PUD1 - Peshastin serves 1,397 people in Washington. It is a Local-owned system using Groundwater water sources with 283 service connections.
What type of violations does CHELAN CO PUD1 - Peshastin have? ▼
CHELAN CO PUD1 - Peshastin has 74 total violations: 9 health-based violations (MCL exceedances or treatment failures), 59 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CHELAN CO PUD1 - Peshastin water? ▼
No PFAS testing data is available for CHELAN CO PUD1 - Peshastin under the EPA's UCMR5 monitoring program.
What water source does CHELAN CO PUD1 - Peshastin use? ▼
CHELAN CO PUD1 - Peshastin uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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