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TRI-CITY WATER DISTRICT #45

PWS ID: WA5389400 · Kennewick, Washington 99338

TRI-CITY WATER DISTRICT #45 serves 300 people in Kennewick, Washington using Groundwater water sources. It has 357 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TRI-CITY WATER DISTRICT #45

TRI-CITY WATER DISTRICT #45 is a local-owned community water system that delivers drinking water to 300 residents in Kennewick, Washington (Benton County) through 108 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 357 total violations for this system , of which 1 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 355 monitoring and reporting violations are on file. The most recent violation on record dates to 2008.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 16 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. TRI-CITY WATER DISTRICT #45's 357 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
300
Total Violations
357
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
108
County
Benton
School/Daycare
No
MCL Violations
1
Monitoring Violations
355
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 16 2008
p-Dichlorobenzene MR 16 2008
Vinyl chloride MR 16 2008
1,2-Dichloroethane MR 16 2008
1,1,1-Trichloroethane MR 16 2008
1,2-Dichloropropane MR 16 2008
Trichloroethylene MR 16 2008
Benzene MR 16 2008
Toluene MR 16 2008
Ethylbenzene MR 16 2008
cis-1,2-Dichloroethylene MR 16 2008
DICHLOROMETHANE MR 16 2008
1,1-Dichloroethylene MR 16 2008
trans-1,2-Dichloroethylene MR 16 2008
1,1,2-Trichloroethane MR 16 2008
Tetrachloroethylene MR 16 2008
Styrene MR 16 2008
o-Dichlorobenzene MR 16 2008
Carbon tetrachloride MR 16 2008
CHLOROBENZENE MR 16 2008
Lead and Copper Rule MR 10 2006
Coliform (TCR) MR 6 1992
ETHYLENE DIBROMIDE MR 5 2005
1,2-DIBROMO-3-CHLOROPROPANE MR 5 2005
Barium MR 1 1979
Arsenic MR 1 1979
Selenium MR 1 1979
Nitrate MR 1 1979
Gross Alpha, Excl. Radon and U MR 1 1979
Consumer Confidence Rule Other 1 1999

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 TRI-CITY WATER DISTRICT #45.

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 WA5389400 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 TRI-CITY WATER DISTRICT #45 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
2008 1,2,4-Trichlorobenzene MR 16 SDWIS / WA5389400 / 2378
2008 p-Dichlorobenzene MR 16 SDWIS / WA5389400 / 2969
2008 Vinyl chloride MR 16 SDWIS / WA5389400 / 2976
2008 1,2-Dichloroethane MR 16 SDWIS / WA5389400 / 2980
2008 1,1,1-Trichloroethane MR 16 SDWIS / WA5389400 / 2981
2008 1,2-Dichloropropane MR 16 SDWIS / WA5389400 / 2983
2008 Trichloroethylene MR 16 SDWIS / WA5389400 / 2984
2008 Benzene MR 16 SDWIS / WA5389400 / 2990
2008 Toluene MR 16 SDWIS / WA5389400 / 2991
2008 Ethylbenzene MR 16 SDWIS / WA5389400 / 2992
2008 cis-1,2-Dichloroethylene MR 16 SDWIS / WA5389400 / 2380
2008 DICHLOROMETHANE MR 16 SDWIS / WA5389400 / 2964
2008 1,1-Dichloroethylene MR 16 SDWIS / WA5389400 / 2977
2008 trans-1,2-Dichloroethylene MR 16 SDWIS / WA5389400 / 2979
2008 1,1,2-Trichloroethane MR 16 SDWIS / WA5389400 / 2985

How TRI-CITY WATER DISTRICT #45 Compares

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

Metric TRI-CITY WATER DISTRICT #45 Washington avg Federal benchmark
Total violations 357 69 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 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 300 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 TRI-CITY WATER DISTRICT #45 water safe to drink? ▼
TRI-CITY WATER DISTRICT #45 (PWS ID: WA5389400) has 357 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does TRI-CITY WATER DISTRICT #45 serve? ▼
TRI-CITY WATER DISTRICT #45 serves 300 people in Kennewick, Washington. It is a Local-owned system using Groundwater water sources with 108 service connections.
What type of violations does TRI-CITY WATER DISTRICT #45 have? ▼
TRI-CITY WATER DISTRICT #45 has 357 total violations: 1 health-based violations (MCL exceedances or treatment failures), 355 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TRI-CITY WATER DISTRICT #45 water? ▼
No PFAS testing data is available for TRI-CITY WATER DISTRICT #45 under the EPA's UCMR5 monitoring program.
What water source does TRI-CITY WATER DISTRICT #45 use? ▼
TRI-CITY WATER DISTRICT #45 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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