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Tap water quality report

Tri-City Water District #45

EPA monitoring tested this supplier for 74 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

74
contaminants tested
15
detected
300
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Benton

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

1
health-based violations
357
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1995-07-01 → 1995-07-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31
MR Monitoring Resolved 2008-01-01 → 2008-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
3200 µg/L 32%
of the EPA limit 10000 µg/L
 14/14 SYR4 2012–2018
Lead
0.0044 mg/L 29%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2025
Bromoform
11.9 µg/L
No EPA limit set
 10/10 SYR4 2012–2018
Dibromochloromethane
5.87 µg/L
No EPA limit set
 10/10 SYR4 2012–2018
TTHM
19.8 µg/L 25%
of the EPA limit 80 µg/L
 10/10 SYR4 2012–2018
Bromodichloromethane
1.58 µg/L
No EPA limit set
 6/10 SYR4 2012–2018
Dibromoacetic Acid
1.93 µg/L
No EPA limit set
 5/5 SYR4 2012–2018
Total Haloacetic Acids (HAA5)
1.93 µg/L 3.2%
of the EPA limit 60 µg/L
 5/5 SYR4 2012–2018
Chloroform
0.4500 µg/L
No EPA limit set
 2/10 SYR4 2012–2018
Arsenic
1.38 µg/L 14%
of the EPA limit 10 µg/L
 1/1 SYR4 2016
Barium
52.3 µg/L 2.6%
of the EPA limit 2000 µg/L
 1/1 SYR4 2016
Copper
1.9 µg/L 0.1%
of the EPA limit 1300 µg/L
 1/1 SYR4 2016
Fluoride
512 µg/L 13%
of the EPA limit 4000 µg/L
 1/1 SYR4 2016
Nitrate-Nitrite
1290 µg/L 13%
of the EPA limit 10000 µg/L
 1/1 SYR4 2016
Selenium
2.53 µg/L 5.1%
of the EPA limit 50 µg/L
 1/1 SYR4 2016
59 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Daniel Harris

Frequently asked questions about Tri-City Water District #45

Is Tri-City Water District #45 tap water safe to drink?

EPA monitoring detected 15 contaminants in Tri-City Water District #45's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Tri-City Water District #45's water?

EPA monitoring detected Nitrate, Lead, Bromoform, Dibromochloromethane, TTHM, and others. The full list with the level and data source for each is above.

How many people does Tri-City Water District #45 serve?

Tri-City Water District #45 reports serving 300 people in Washington, per its EPA record.

Has Tri-City Water District #45 had any water quality violations?

The EPA has 357 violations on file for Tri-City Water District #45, of which 1 is health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.