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Tap water quality report

Tumwater, WA

EPA monitoring detected 17 contaminants across the 2 water suppliers serving Tumwater. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
51,924
people served
17
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Tumwater's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
1760 µg/L 18%
of the EPA limit 10000 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
Highest in the city: 2120 µg/L — LAKELAND MANOR · 122 people · 2019
2/2 SYR4
Nitrate-Nitrite
1460 µg/L 15%
of the EPA limit 10000 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
2/2 SYR4
Copper
11 µg/L 0.8%
of the EPA limit 1300 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
2/2 SYR4
Trichloroacetic Acid
7.9 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
TTHM
6.185 µg/L 7.7%
of the EPA limit 80 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Dichloroacetic Acid
5.3 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Barium
5 µg/L 0.3%
of the EPA limit 2000 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
2/2 SYR4
Dibromochloromethane
2.8 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
2.76 µg/L 4.6%
of the EPA limit 60 µg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Gross Beta Particle Activity
2.73 pCi/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2016
1/2 SYR4
Bromoform
1.765 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Bromodichloromethane
1.6 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Dibromoacetic Acid
1.52 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
Highest in the city: LAKELAND MANOR · 122 people · 2019
1/2 SYR4
Chloroform
0.9900 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
1/2 SYR4
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
Main supplier: TUMWATER CITY OF · 51,802 people · 2019
2/2 LCR
PFBS
0.0068 µg/L
No EPA limit set
Main supplier: TUMWATER CITY OF · 51,802 people · 2023
1/2 UCMR-5
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Tumwater

SupplierPopulation served
TUMWATER CITY OF 51,802
LAKELAND MANOR 122

Frequently asked questions about Tumwater tap water

Is Tumwater tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Tumwater. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Tumwater?

2 public water suppliers report drinking-water monitoring for Tumwater, Washington to the EPA. Each is listed above with its population served.

What contaminants are in Tumwater's water?

The contaminants EPA monitoring detected in Tumwater include Nitrate, Nitrate-Nitrite, Copper, Trichloroacetic Acid, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.

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.