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Tap water quality report

Prineville, City of

EPA monitoring tested this supplier for 104 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
15
detected
11,000
people served
1
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Ground water
Ownership
Local government
Counties served
Crook

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.

1
health-based violations
234
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2006-05-01 → 2006-05-31
MR Monitoring Resolved 2025-06-01 → 2025-06-30
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31
MR Monitoring Resolved 2025-01-01 → 2025-01-31

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
5330 µg/L 53%
of the EPA limit 10000 µg/L
worst single sample: 5740 µg/L
92/152 SYR4 2012–2019
Copper
150.2 µg/L 12%
of the EPA limit 1300 µg/L
worst single sample: 360 µg/L
55/60 SYR4 2012–2018
Lead
0.0019 mg/L 13%
of the EPA limit 0.0150 mg/L
 23/23 LCR 2026
TTHM
14.515 µg/L 18%
of the EPA limit 80 µg/L
worst single sample: 16 µg/L
12/18 SYR4 2012–2019
Lead
21.9 µg/L 146%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 30 µg/L
7/60 SYR4 2012–2018
Combined Uranium
3.75 µg/L 13%
of the EPA limit 30 µg/L
worst single sample: 4 µg/L
6/9 SYR4 2014–2017
Fluoride
886.7 µg/L 22%
of the EPA limit 4000 µg/L
worst single sample: 887 µg/L
3/3 SYR4 2014–2017
Nitrate-Nitrite
874 µg/L 8.7%
of the EPA limit 10000 µg/L
worst single sample: 880 µg/L
3/3 SYR4 2014–2017
Total Haloacetic Acids (HAA5)
3.93 µg/L 6.6%
of the EPA limit 60 µg/L
worst single sample: 4.1 µg/L
3/18 SYR4 2012–2019
Lithium
20.8 µg/L
No EPA limit set
 3/10 UCMR-5 2023
Arsenic
2 µg/L 20%
of the EPA limit 10 µg/L
 1/6 SYR4 2014–2017
Barium
6 µg/L 0.3%
of the EPA limit 2000 µg/L
 1/3 SYR4 2014–2017
Chromium
2 µg/L 2%
of the EPA limit 100 µg/L
 1/3 SYR4 2014–2017
Combined Radium (-226 And -228)
1.4 pCi/L 28%
of the EPA limit 5 pCi/L
 1/10 SYR4 2012–2016
Toxaphene
0.1000 µg/L 3.3%
of the EPA limit 3 µg/L
 1/27 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PRINEVILLE, CITY OF
Phone
541-447-5627
Email
[email protected]

Frequently asked questions about Prineville, City of

Is Prineville, City of tap water safe to drink?

EPA monitoring detected 15 contaminants in Prineville, 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 Prineville, City of's water?

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

How many people does Prineville, City of serve?

Prineville, City of reports serving 11,000 people in Oregon, per its EPA record.

Has Prineville, City of had any water quality violations?

The EPA has 234 violations on file for Prineville, City of, of which 1 is 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.