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Non-Transient Non-Community Water System · PWS WA5309677

Ice Harbor Dam

Pasco, Washington 99301 - drinking water served from groundwater sources to 197 people, tracked in EPA SDWIS and UCMR5.

197
People served
658
EPA violations
145
Health-based
Untested
UCMR5 result

The verdict

EPA records 658 drinking-water violations at Ice Harbor Dam, 22% of them health-based - above the Washington per-system average.

658
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
197
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Ice Harbor Dam

Ice Harbor Dam is a federal-owned non-transient non-community water system that delivers drinking water to 197 residents in Pasco, Washington (Walla Walla County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 658 total violations for this system , of which 145 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 512 monitoring and reporting violations are on file. The most recent violation on record dates to 2012.

The most frequently cited contaminant at this system is Nitrate, recorded in 139 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. Statewide, 98 of 247 UCMR5-tested systems have reported PFAS detections (39.7%).

Ice Harbor Dam's 658 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
197
Total Violations
658
Health-Based Violations
145
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Federal
Connections
2
County
Walla Walla
School/Daycare
No
MCL Violations
145
Monitoring Violations
512
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 139 2010
o-Dichlorobenzene MR 15 2005
Vinyl chloride MR 15 2005
1,2-Dichloroethane MR 15 2005
1,1,1-Trichloroethane MR 15 2005
1,2-Dichloropropane MR 15 2005
Trichloroethylene MR 15 2005
Benzene MR 15 2005
Styrene MR 15 2005
1,2,4-Trichlorobenzene MR 15 2005
DICHLOROMETHANE MR 15 2005
p-Dichlorobenzene MR 15 2005
1,1-Dichloroethylene MR 15 2005
trans-1,2-Dichloroethylene MR 15 2005
CHLOROBENZENE MR 15 2005
Toluene MR 15 2005
Ethylbenzene MR 15 2005
Carbon tetrachloride MR 15 2005
Tetrachloroethylene MR 15 2005
1,1,2-Trichloroethane MR 15 2005
cis-1,2-Dichloroethylene MR 15 2005
Chromium MR 8 2002
CYANIDE MR 8 2002
Fluoride MR 8 2002
Mercury MR 8 2002
Nickel MR 8 2002
Antimony, Total MR 8 2002
Barium MR 8 2002
Cadmium MR 8 2002
Selenium MR 8 2002

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 Ice Harbor Dam.

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 WA5309677 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 Ice Harbor Dam 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
2012 Coliform (TCR) MR 2 SDWIS / WA5309677 / 3100
2010 Nitrate MCL 139 SDWIS / WA5309677 / 1040
2005 o-Dichlorobenzene MR 15 SDWIS / WA5309677 / 2968
2005 Vinyl chloride MR 15 SDWIS / WA5309677 / 2976
2005 1,2-Dichloroethane MR 15 SDWIS / WA5309677 / 2980
2005 1,1,1-Trichloroethane MR 15 SDWIS / WA5309677 / 2981
2005 1,2-Dichloropropane MR 15 SDWIS / WA5309677 / 2983
2005 Trichloroethylene MR 15 SDWIS / WA5309677 / 2984
2005 Benzene MR 15 SDWIS / WA5309677 / 2990
2005 Styrene MR 15 SDWIS / WA5309677 / 2996
2005 1,2,4-Trichlorobenzene MR 15 SDWIS / WA5309677 / 2378
2005 DICHLOROMETHANE MR 15 SDWIS / WA5309677 / 2964
2005 p-Dichlorobenzene MR 15 SDWIS / WA5309677 / 2969
2005 1,1-Dichloroethylene MR 15 SDWIS / WA5309677 / 2977
2005 trans-1,2-Dichloroethylene MR 15 SDWIS / WA5309677 / 2979

How Ice Harbor Dam Compares

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

Metric Ice Harbor Dam Washington avg Federal benchmark
Total violations 658 69 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 145 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 197 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 Ice Harbor Dam water safe to drink? ▼
Ice Harbor Dam (PWS ID: WA5309677) has 658 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 197 people using Groundwater sources.
How many people does Ice Harbor Dam serve? ▼
Ice Harbor Dam serves 197 people in Pasco, Washington. It is a Federal-owned system using Groundwater water sources with 2 service connections.
What type of violations does Ice Harbor Dam have? ▼
Ice Harbor Dam has 658 total violations: 145 health-based violations (MCL exceedances or treatment failures), 512 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Ice Harbor Dam water? ▼
No PFAS testing data is available for Ice Harbor Dam under the EPA's UCMR5 monitoring program.
What water source does Ice Harbor Dam use? ▼
Ice Harbor Dam uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.