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Grand Prairie Water Supply Co

EPA monitoring tested this supplier for 73 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

73
contaminants tested
4
detected
110
people served
5
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Ground water
Ownership
Private
Counties served
Linn

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
146
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 2001-01-01 → 2001-01-31
MCL Health-based Resolved 2001-01-01 → 2001-01-31
Other Monitoring Resolved 2025-07-01
MR Monitoring Resolved 2002-07-01 → 2002-07-31
MR Monitoring Resolved 2002-01-01 → 2004-12-31
MR Monitoring Resolved 2002-01-01 → 2004-12-31
MR Monitoring Resolved 2002-01-01 → 2004-12-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
139 µg/L 11%
of the EPA limit 1300 µg/L
 14/15 SYR4 2012–2018
Lead
0.0014 mg/L 9.3%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Lead
8 µg/L 53%
of the EPA limit 15 µg/L
 5/15 SYR4 2012–2018
Barium
8 µg/L 0.4%
of the EPA limit 2000 µg/L
 1/1 SYR4 2016
69 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-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrateNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
GRAND PRAIRIE WATER SUPPLY CO
Phone
541-905-7321
Email
63sweptline@comcast.net

Frequently asked questions about Grand Prairie Water Supply Co

Is Grand Prairie Water Supply Co tap water safe to drink?

EPA monitoring detected 4 contaminants in Grand Prairie Water Supply Co'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 Grand Prairie Water Supply Co's water?

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

How many people does Grand Prairie Water Supply Co serve?

Grand Prairie Water Supply Co reports serving 110 people in Oregon, per its EPA record.

Has Grand Prairie Water Supply Co had any water quality violations?

The EPA has 146 violations on file for Grand Prairie Water Supply Co, of which 5 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.