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Tap water quality report

Warden, WA

EPA monitoring detected 21 contaminants across the 3 water suppliers serving Warden. 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.

3
water suppliers
4,746
people served
21
contaminants found
Washington rankings Lead in Washington PFAS in Washington

What was found in Warden'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-Nitrite
13744 µg/L 137%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
3/3 SYR4
Nitrate
5120 µg/L 51%
of the EPA limit 10000 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2019
Highest in the city: 5610 µg/L — SAGE HILLS ESTATES 1 · 38 people · 2018
3/3 SYR4
Fluoride
826.75 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
3/3 SYR4
TTHM
26.802 µg/L 34%
of the EPA limit 80 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Barium
23.75 µg/L 1.2%
of the EPA limit 2000 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
3/3 SYR4
Bromoform
13.61 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Arsenic
5.7475 µg/L 57%
of the EPA limit 10 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
Highest in the city: 12.2 µg/L — SAGE HILLS SECOND WATER SYSTEM · 34 people · 2019
3/3 SYR4
Copper
3.497 µg/L 0.3%
of the EPA limit 1300 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
Highest in the city: 9.81 µg/L — SAGE HILLS SECOND WATER SYSTEM · 34 people · 2019
3/3 SYR4
Dibromochloromethane
9.7605 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Lithium
9.3 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2025
1/3 UCMR-5
Selenium
4.81 µg/L 9.6%
of the EPA limit 50 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
1/3 SYR4
Dibromoacetic Acid
3.1145 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Total Haloacetic Acids (HAA5)
3.1145 µg/L 5.2%
of the EPA limit 60 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Bromodichloromethane
2.977 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Chromium
1.453 µg/L 1.5%
of the EPA limit 100 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
1/3 SYR4
Chloroform
0.7300 µg/L
No EPA limit set
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Trichloroethylene
0.7040 µg/L 14%
of the EPA limit 5 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2019
1/3 SYR4
Lead
0.2920 µg/L 1.9%
of the EPA limit 15 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
1/3 SYR4
Thallium, Total
0.2745 µg/L 14%
of the EPA limit 2 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2018
1/3 SYR4
Ethylene Dibromide
0.1164 µg/L 233%
of the EPA limit, at the 95th percentile of samples — 0.0500 µg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2016
1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: WARDEN CITY OF · 4,674 people · 2024
3/3 LCR
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 Warden

SupplierPopulation served
WARDEN CITY OF 4,674
SAGE HILLS ESTATES 1 38
SAGE HILLS SECOND WATER SYSTEM 34

Frequently asked questions about Warden tap water

Is Warden tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Warden. 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 Warden?

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

What contaminants are in Warden's water?

The contaminants EPA monitoring detected in Warden include Nitrate-Nitrite, Nitrate, Fluoride, TTHM, Barium. 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.