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Tap water quality report

Stevens Co Pud - Mission Ridge

EPA monitoring tested this supplier for 59 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

59
contaminants tested
15
detected
120
people served
5
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Stevens

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.

5
health-based violations
477
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2014-07-01 → 2014-09-30
MCL Health-based Resolved 2014-04-01 → 2014-06-30
MCL Health-based Archived 1999-10-01 → 1999-10-31
MCL Health-based Archived 1999-10-01 → 1999-10-31
MCL Health-based Archived 1999-10-01 → 1999-10-31
MR Monitoring Unaddressed 2025-07-01
MR Monitoring Resolved 2022-10-01 → 2022-12-31
MR Monitoring Resolved 2020-01-01 → 2020-03-31
MR Monitoring Resolved 2017-01-01 → 2019-12-31
MR Monitoring Resolved 2017-01-01 → 2019-12-31

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 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
263 µg/L 2.6%
of the EPA limit 10000 µg/L
 12/34 SYR4 2012–2019
Lead
0.00070 mg/L 4.7%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Barium
48.075 µg/L 2.4%
of the EPA limit 2000 µg/L
worst single sample: 52.2 µg/L
4/4 SYR4 2012–2019
Antimony, Total
2.65 µg/L 44%
of the EPA limit 6 µg/L
worst single sample: 2.8 µg/L
3/4 SYR4 2012–2019
Copper
25.861 µg/L 2%
of the EPA limit 1300 µg/L
worst single sample: 27.7 µg/L
3/4 SYR4 2012–2019
Chloroform
0.6730 µg/L
No EPA limit set
worst single sample: 0.6900 µg/L
2/8 SYR4 2012–2018
Fluoride
284.1 µg/L 7.1%
of the EPA limit 4000 µg/L
worst single sample: 291 µg/L
2/4 SYR4 2012–2019
TTHM
1.224 µg/L 1.5%
of the EPA limit 80 µg/L
worst single sample: 1.27 µg/L
2/2 SYR4 2013–2017
Arsenic
20.1 µg/L 201%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
 1/4 SYR4 2012–2019
Bromodichloromethane
0.5800 µg/L
No EPA limit set
 1/8 SYR4 2012–2018
Cadmium
1.28 µg/L 26%
of the EPA limit 5 µg/L
 1/4 SYR4 2012–2019
Combined Radium (-226 And -228)
0.4000 pCi/L 8%
of the EPA limit 5 pCi/L
 1/1 SYR4 2012
Combined Uranium
8 µg/L 27%
of the EPA limit 30 µg/L
 1/1 SYR4 2012
Lead
10.2 µg/L 68%
of the EPA limit 15 µg/L
 1/4 SYR4 2012–2019
Nitrate-Nitrite
263 µg/L 2.6%
of the EPA limit 10000 µg/L
 1/4 SYR4 2012–2019
44 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-DBenzeneBeryllium, TotalBromoformChlorobenzeneCyanideCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylene DibromideEthylbenzeneMercuryMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Jim Carpenter

Frequently asked questions about Stevens Co Pud - Mission Ridge

Is Stevens Co Pud - Mission Ridge tap water safe to drink?

EPA monitoring detected 15 contaminants in Stevens Co Pud - Mission Ridge'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 Stevens Co Pud - Mission Ridge's water?

EPA monitoring detected Nitrate, Lead, Barium, Antimony, Total, Copper, and others. The full list with the level and data source for each is above.

How many people does Stevens Co Pud - Mission Ridge serve?

Stevens Co Pud - Mission Ridge reports serving 120 people in Washington, per its EPA record.

Has Stevens Co Pud - Mission Ridge had any water quality violations?

The EPA has 477 violations on file for Stevens Co Pud - Mission Ridge, of which 5 are health-based (a contaminant limit or required treatment was breached) and 1 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.