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Tap water quality report

Spokane City of

EPA monitoring tested this supplier for 108 contaminants and detected 19. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

108
contaminants tested
19
detected
346,138
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Spokane

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.

0
health-based violations
1
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Archived 1979-10-01 → 1979-10-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0039 µg/L 1/12 2025
Pfhxa 0.0035 µg/L 1/12 2025
PFOS 0.0061 µg/L 1/12 2025
Pfpea 0.0033 µg/L 1/12 2025

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
3327.5 µg/L 33%
of the EPA limit 10000 µg/L
worst single sample: 3680 µg/L
156/156 SYR4 2012–2019
TTHM
4.816 µg/L 6%
of the EPA limit 80 µg/L
worst single sample: 5.64 µg/L
78/78 SYR4 2012–2019
Dibromochloromethane
1.922 µg/L
No EPA limit set
worst single sample: 2.33 µg/L
77/114 SYR4 2012–2019
Bromodichloromethane
1.376 µg/L
No EPA limit set
worst single sample: 1.74 µg/L
69/114 SYR4 2012–2019
Chloroform
0.8945 µg/L
No EPA limit set
worst single sample: 1.28 µg/L
52/114 SYR4 2012–2019
Bromoform
1.6475 µg/L
No EPA limit set
worst single sample: 1.78 µg/L
42/115 SYR4 2012–2019
Copper
8.4955 µg/L 0.7%
of the EPA limit 1300 µg/L
worst single sample: 14.5 µg/L
24/30 SYR4 2012–2019
Arsenic
4.782 µg/L 48%
of the EPA limit 10 µg/L
worst single sample: 5.07 µg/L
19/19 SYR4 2012–2019
Barium
48.43 µg/L 2.4%
of the EPA limit 2000 µg/L
worst single sample: 59.5 µg/L
19/19 SYR4 2012–2019
Nitrate-Nitrite
2553 µg/L 26%
of the EPA limit 10000 µg/L
worst single sample: 2940 µg/L
19/19 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Lead
2.6695 µg/L 18%
of the EPA limit 15 µg/L
worst single sample: 2.71 µg/L
10/30 SYR4 2012–2019
Chromium
1.3085 µg/L 1.3%
of the EPA limit 100 µg/L
worst single sample: 1.31 µg/L
2/19 SYR4 2012–2019
Mercury
0.2190 µg/L 11%
of the EPA limit 2 µg/L
worst single sample: 0.2200 µg/L
2/19 SYR4 2012–2019
Selenium
1.15 µg/L 2.3%
of the EPA limit 50 µg/L
 1/19 SYR4 2012–2019
89 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
James Sakamoto

Frequently asked questions about Spokane City of

Is Spokane City of tap water safe to drink?

EPA monitoring detected 19 contaminants in Spokane 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 Spokane City of's water?

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

How many people does Spokane City of serve?

Spokane City of reports serving 346,138 people in Washington, per its EPA record.

Has Spokane City of had any water quality violations?

The EPA has 1 violation on file for Spokane City of, of which 0 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.