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Tap water quality report

Tumwater City of

EPA monitoring tested this supplier for 106 contaminants and detected 16. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

106
contaminants tested
16
detected
51,802
people served
12
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Thurston

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.

12
health-based violations
21
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 2006-08-01 → 2006-08-31
MCL Health-based Archived 2004-10-01 → 2004-10-31
MCL Health-based Archived 2004-08-01 → 2004-08-31
MCL Health-based Archived 1998-09-01 → 1998-09-30
MCL Health-based Archived 1998-09-01 → 1998-09-30
MCL Health-based Archived 1998-09-01 → 1998-09-30
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1998-04-01 → 1998-04-30
MCL Health-based Archived 1997-09-01 → 1997-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0068 µg/L 2/10 2023

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
1760 µg/L 18%
of the EPA limit 10000 µg/L
worst single sample: 1800 µg/L
104/104 SYR4 2012–2019
Dibromochloromethane
2.8 µg/L
No EPA limit set
worst single sample: 3.4 µg/L
84/114 SYR4 2012–2019
TTHM
6.185 µg/L 7.7%
of the EPA limit 80 µg/L
worst single sample: 7.4 µg/L
84/84 SYR4 2012–2019
Bromoform
1.765 µg/L
No EPA limit set
worst single sample: 2 µg/L
68/111 SYR4 2012–2019
Bromodichloromethane
1.6 µg/L
No EPA limit set
worst single sample: 2 µg/L
51/98 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
2.76 µg/L 4.6%
of the EPA limit 60 µg/L
worst single sample: 13.2 µg/L
19/109 SYR4 2012–2019
Dibromoacetic Acid
1.52 µg/L
No EPA limit set
worst single sample: 1.6 µg/L
17/109 SYR4 2012–2019
Chloroform
0.9900 µg/L
No EPA limit set
worst single sample: 1.2 µg/L
15/116 SYR4 2012–2019
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2019
Nitrate-Nitrite
1460 µg/L 15%
of the EPA limit 10000 µg/L
worst single sample: 1480 µg/L
9/9 SYR4 2012–2019
Barium
5 µg/L 0.3%
of the EPA limit 2000 µg/L
 7/9 SYR4 2012–2019
Copper
11 µg/L 0.8%
of the EPA limit 1300 µg/L
 1/9 SYR4 2012–2019
Dichloroacetic Acid
5.3 µg/L
No EPA limit set
 1/109 SYR4 2012–2019
Gross Beta Particle Activity
2.73 pCi/L
No EPA limit set
 1/6 SYR4 2015–2016
Trichloroacetic Acid
7.9 µg/L
No EPA limit set
 1/109 SYR4 2012–2019
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneFluorideHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Steven Craig

Frequently asked questions about Tumwater City of

Is Tumwater City of tap water safe to drink?

EPA monitoring detected 16 contaminants in Tumwater City of'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 Tumwater City of's water?

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

How many people does Tumwater City of serve?

Tumwater City of reports serving 51,802 people in Washington, per its EPA record.

Has Tumwater City of had any water quality violations?

The EPA has 21 violations on file for Tumwater City of, of which 12 are 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.