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STILLIRIDGE

PWS ID: WA5318707 · Port Orchard, Washington 98366

STILLIRIDGE serves 83 people in Port Orchard, Washington using Groundwater water sources. It has 837 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: STILLIRIDGE

STILLIRIDGE is a private-owned community water system that delivers drinking water to 83 residents in Port Orchard, Washington (Snohomish County) through 31 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 837 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 831 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 33 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. STILLIRIDGE's 837 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
83
Total Violations
837
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
31
County
Snohomish
School/Daycare
No
MCL Violations
0
Monitoring Violations
831
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 33 2006
cis-1,2-Dichloroethylene MR 33 2006
o-Dichlorobenzene MR 33 2006
p-Dichlorobenzene MR 33 2006
1,1-Dichloroethylene MR 33 2006
1,1,1-Trichloroethane MR 33 2006
Carbon tetrachloride MR 33 2006
1,2-Dichloropropane MR 33 2006
1,1,2-Trichloroethane MR 33 2006
Tetrachloroethylene MR 33 2006
CHLOROBENZENE MR 33 2006
Toluene MR 33 2006
DICHLOROMETHANE MR 33 2006
Vinyl chloride MR 33 2006
trans-1,2-Dichloroethylene MR 33 2006
1,2-Dichloroethane MR 33 2006
Benzene MR 33 2006
Styrene MR 33 2006
Ethylbenzene MR 33 2006
Trichloroethylene MR 33 2006
Pentachlorophenol MR 12 2006
Lead and Copper Rule MR 11 2007
Benzo(a)pyrene MR 6 2006
Atrazine MR 6 2006
OXAMYL MR 6 2006
Heptachlor epoxide MR 6 2006
HEXACHLOROBENZENE MR 6 2006
Heptachlor MR 6 2006
Aldicarb sulfone MR 6 2006
Chlordane MR 6 2006

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 STILLIRIDGE.

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 WA5318707 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 STILLIRIDGE 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
2020 Revised Total Coliform Rule MON 1 SDWIS / WA5318707 / 8000
2013 Consumer Confidence Rule Other 3 SDWIS / WA5318707 / 7000
2007 Lead and Copper Rule MR 11 SDWIS / WA5318707 / 5000
2006 1,2,4-Trichlorobenzene MR 33 SDWIS / WA5318707 / 2378
2006 cis-1,2-Dichloroethylene MR 33 SDWIS / WA5318707 / 2380
2006 o-Dichlorobenzene MR 33 SDWIS / WA5318707 / 2968
2006 p-Dichlorobenzene MR 33 SDWIS / WA5318707 / 2969
2006 1,1-Dichloroethylene MR 33 SDWIS / WA5318707 / 2977
2006 1,1,1-Trichloroethane MR 33 SDWIS / WA5318707 / 2981
2006 Carbon tetrachloride MR 33 SDWIS / WA5318707 / 2982
2006 1,2-Dichloropropane MR 33 SDWIS / WA5318707 / 2983
2006 1,1,2-Trichloroethane MR 33 SDWIS / WA5318707 / 2985
2006 Tetrachloroethylene MR 33 SDWIS / WA5318707 / 2987
2006 CHLOROBENZENE MR 33 SDWIS / WA5318707 / 2989
2006 Toluene MR 33 SDWIS / WA5318707 / 2991

How STILLIRIDGE Compares

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

Metric STILLIRIDGE Washington avg Federal benchmark
Total violations 837 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 83 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 STILLIRIDGE water safe to drink? ▼
STILLIRIDGE (PWS ID: WA5318707) has 837 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 83 people using Groundwater sources.
How many people does STILLIRIDGE serve? ▼
STILLIRIDGE serves 83 people in Port Orchard, Washington. It is a Private-owned system using Groundwater water sources with 31 service connections.
What type of violations does STILLIRIDGE have? ▼
STILLIRIDGE has 837 total violations: 0 health-based violations (MCL exceedances or treatment failures), 831 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in STILLIRIDGE water? ▼
No PFAS testing data is available for STILLIRIDGE under the EPA's UCMR5 monitoring program.
What water source does STILLIRIDGE use? ▼
STILLIRIDGE 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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