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LARCH CORRECTIONS CENTER

PWS ID: WA5306461 · YACOLT, Washington 98675

LARCH CORRECTIONS CENTER serves 705 people in YACOLT, Washington using Groundwater water sources. It has 366 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: LARCH CORRECTIONS CENTER

LARCH CORRECTIONS CENTER is a state-owned community water system that delivers drinking water to 705 residents in YACOLT, Washington (Clark County) through 496 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 366 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 366 monitoring and reporting violations are on file. The most recent violation on record dates to 2005.

The most frequently cited contaminant at this system is cis-1,2-Dichloroethylene, recorded in 18 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. LARCH CORRECTIONS CENTER's 366 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
705
Total Violations
366
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
State
Connections
496
County
Clark
School/Daycare
No
MCL Violations
0
Monitoring Violations
366
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
cis-1,2-Dichloroethylene MR 18 2005
DICHLOROMETHANE MR 18 2005
o-Dichlorobenzene MR 18 2005
Vinyl chloride MR 18 2005
1,2-Dichloroethane MR 18 2005
1,1,2-Trichloroethane MR 18 2005
CHLOROBENZENE MR 18 2005
Ethylbenzene MR 18 2005
p-Dichlorobenzene MR 18 2005
Trichloroethylene MR 18 2005
Tetrachloroethylene MR 18 2005
Toluene MR 18 2005
Styrene MR 18 2005
1,2,4-Trichlorobenzene MR 18 2005
1,1-Dichloroethylene MR 18 2005
1,1,1-Trichloroethane MR 18 2005
Carbon tetrachloride MR 18 2005
1,2-Dichloropropane MR 18 2005
Benzene MR 18 2005
trans-1,2-Dichloroethylene MR 18 2005
Diquat MR 5 2005
Coliform (TCR) MR 1 1998

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 LARCH CORRECTIONS CENTER.

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 WA5306461 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 LARCH CORRECTIONS CENTER 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
2005 cis-1,2-Dichloroethylene MR 18 SDWIS / WA5306461 / 2380
2005 DICHLOROMETHANE MR 18 SDWIS / WA5306461 / 2964
2005 o-Dichlorobenzene MR 18 SDWIS / WA5306461 / 2968
2005 Vinyl chloride MR 18 SDWIS / WA5306461 / 2976
2005 1,2-Dichloroethane MR 18 SDWIS / WA5306461 / 2980
2005 1,1,2-Trichloroethane MR 18 SDWIS / WA5306461 / 2985
2005 CHLOROBENZENE MR 18 SDWIS / WA5306461 / 2989
2005 Ethylbenzene MR 18 SDWIS / WA5306461 / 2992
2005 p-Dichlorobenzene MR 18 SDWIS / WA5306461 / 2969
2005 Trichloroethylene MR 18 SDWIS / WA5306461 / 2984
2005 Tetrachloroethylene MR 18 SDWIS / WA5306461 / 2987
2005 Toluene MR 18 SDWIS / WA5306461 / 2991
2005 Styrene MR 18 SDWIS / WA5306461 / 2996
2005 1,2,4-Trichlorobenzene MR 18 SDWIS / WA5306461 / 2378
2005 1,1-Dichloroethylene MR 18 SDWIS / WA5306461 / 2977

How LARCH CORRECTIONS CENTER Compares

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

Metric LARCH CORRECTIONS CENTER Washington avg Federal benchmark
Total violations 366 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 705 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 LARCH CORRECTIONS CENTER water safe to drink? ▼
LARCH CORRECTIONS CENTER (PWS ID: WA5306461) has 366 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 705 people using Groundwater sources.
How many people does LARCH CORRECTIONS CENTER serve? ▼
LARCH CORRECTIONS CENTER serves 705 people in YACOLT, Washington. It is a State-owned system using Groundwater water sources with 496 service connections.
What type of violations does LARCH CORRECTIONS CENTER have? ▼
LARCH CORRECTIONS CENTER has 366 total violations: 0 health-based violations (MCL exceedances or treatment failures), 366 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LARCH CORRECTIONS CENTER water? ▼
No PFAS testing data is available for LARCH CORRECTIONS CENTER under the EPA's UCMR5 monitoring program.
What water source does LARCH CORRECTIONS CENTER use? ▼
LARCH CORRECTIONS CENTER 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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