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Tap water quality report

Dexter Oaks Co-Op

EPA monitoring tested this supplier for 70 contaminants and detected 6. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

70
contaminants tested
6
detected
75
people served
71
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
Ground water
Ownership
Private
Counties served
Lane

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.

71
health-based violations
93
violations on file
1
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2023-01-01 → 2023-03-31
MCL Health-based Resolved 2023-01-01 → 2023-03-31
MCL Health-based Resolved 2023-01-01 → 2023-03-31
MCL Health-based Resolved 2023-01-01 → 2023-03-31
MCL Health-based Resolved 2022-10-01 → 2022-12-31
MCL Health-based Resolved 2022-10-01 → 2022-12-31
MCL Health-based Resolved 2022-10-01 → 2022-12-31
MCL Health-based Resolved 2022-10-01 → 2022-12-31
MCL Health-based Resolved 2022-07-01 → 2022-09-30
MCL Health-based Resolved 2022-07-01 → 2022-09-30

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
Lead
0.0099 mg/L 66%
of the EPA limit 0.0150 mg/L
 17/17 LCR 2022
Arsenic
236.515 µg/L 2365%
of the EPA limit, at the 95th percentile of samples — 10 µg/L
worst single sample: 400 µg/L
10/16 SYR4 2012–2019
Copper
56.2 µg/L 4.3%
of the EPA limit 1300 µg/L
worst single sample: 61 µg/L
4/15 SYR4 2013–2019
Nitrate
159 µg/L 1.6%
of the EPA limit 10000 µg/L
 4/18 SYR4 2012–2019
Barium
6.08 µg/L 0.3%
of the EPA limit 2000 µg/L
 1/1 SYR4 2019
Lead
9.83 µg/L 66%
of the EPA limit 15 µg/L
 1/15 SYR4 2013–2019
64 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DEXTER OAKS CO-OP
Phone
209-578-3903
Email
dexteroaks@gmail.com

Frequently asked questions about Dexter Oaks Co-Op

Is Dexter Oaks Co-Op tap water safe to drink?

EPA monitoring detected 6 contaminants in Dexter Oaks Co-Op'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 Dexter Oaks Co-Op's water?

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

How many people does Dexter Oaks Co-Op serve?

Dexter Oaks Co-Op reports serving 75 people in Oregon, per its EPA record.

Has Dexter Oaks Co-Op had any water quality violations?

The EPA has 93 violations on file for Dexter Oaks Co-Op, of which 71 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.