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Community Water System · PWS WA5301266

Sunnybank Water System

Cashmere, Washington 98815 - drinking water served from surface water sources to 58 people, tracked in EPA SDWIS and UCMR5.

58
People served
305
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 305 drinking-water violations at Sunnybank Water System, 1% of them health-based - above the Washington per-system average.

305
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
58
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sunnybank Water System

Sunnybank Water System is a private-owned community water system that delivers drinking water to 58 residents in Cashmere, Washington (Chelan County) through 55 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 305 total violations for this system , of which 3 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 296 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 Barium, recorded in 12 violations (MR). 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. Statewide, 66 of 247 UCMR5-tested systems have reported PFAS detections (26.7%).

Sunnybank Water System's 305 violations sit above the Washington average.

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
58
Total Violations
305
Health-Based Violations
3
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
55
County
Chelan
School/Daycare
No
MCL Violations
0
Monitoring Violations
296
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Barium MR 12 2007
Cadmium MR 12 2007
Mercury MR 12 2007
Chromium MR 12 2007
CYANIDE MR 12 2007
Fluoride MR 12 2007
Antimony, Total MR 12 2007
Nickel MR 12 2007
Selenium MR 12 2007
Thallium, Total MR 12 2007
Beryllium, Total MR 12 2007
Arsenic MR 8 2007
1,2,4-Trichlorobenzene MR 7 2007
DICHLOROMETHANE MR 7 2007
p-Dichlorobenzene MR 7 2007
Vinyl chloride MR 7 2007
1,1-Dichloroethylene MR 7 2007
trans-1,2-Dichloroethylene MR 7 2007
1,2-Dichloroethane MR 7 2007
1,1,1-Trichloroethane MR 7 2007
Trichloroethylene MR 7 2007
Ethylbenzene MR 7 2007
Coliform (TCR) MR 7 2006
Carbon tetrachloride MR 7 2007
o-Dichlorobenzene MR 7 2007
1,2-Dichloropropane MR 7 2007
CHLOROBENZENE MR 7 2007
Styrene MR 7 2007
Benzene MR 7 2007
Tetrachloroethylene MR 7 2007

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 Sunnybank Water System.

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 WA5301266 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 Sunnybank Water System 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 4 SDWIS / WA5301266 / 7000
2008 Lead and Copper Rule MR 6 SDWIS / WA5301266 / 5000
2007 Barium MR 12 SDWIS / WA5301266 / 1010
2007 Cadmium MR 12 SDWIS / WA5301266 / 1015
2007 Mercury MR 12 SDWIS / WA5301266 / 1035
2007 Chromium MR 12 SDWIS / WA5301266 / 1020
2007 CYANIDE MR 12 SDWIS / WA5301266 / 1024
2007 Fluoride MR 12 SDWIS / WA5301266 / 1025
2007 Antimony, Total MR 12 SDWIS / WA5301266 / 1074
2007 Nickel MR 12 SDWIS / WA5301266 / 1036
2007 Selenium MR 12 SDWIS / WA5301266 / 1045
2007 Thallium, Total MR 12 SDWIS / WA5301266 / 1085
2007 Beryllium, Total MR 12 SDWIS / WA5301266 / 1075
2007 Arsenic MR 8 SDWIS / WA5301266 / 1005
2007 1,2,4-Trichlorobenzene MR 7 SDWIS / WA5301266 / 2378

How Sunnybank Water System Compares

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

Metric Sunnybank Water System Washington avg Federal benchmark
Total violations 305 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 4.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 26.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 58 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Sunnybank Water System water safe to drink? ▼
Sunnybank Water System (PWS ID: WA5301266) has 305 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 58 people using Surface Water sources.
How many people does Sunnybank Water System serve? ▼
Sunnybank Water System serves 58 people in Cashmere, Washington. It is a Private-owned system using Surface Water water sources with 55 service connections.
What type of violations does Sunnybank Water System have? ▼
Sunnybank Water System has 305 total violations: 3 health-based violations (MCL exceedances or treatment failures), 296 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sunnybank Water System water? ▼
No PFAS testing data is available for Sunnybank Water System under the EPA's UCMR5 monitoring program.
What water source does Sunnybank Water System use? ▼
Sunnybank Water System uses Surface Water 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.