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Tap water quality report

Oak Valley

EPA monitoring tested this supplier for 62 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

62
contaminants tested
13
detected
100
people served
26
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
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.

26
health-based violations
184
violations on file
10
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2012-06-01 → 2012-06-30
MCL Health-based Resolved 2001-06-01 → 2001-06-30
MCL Health-based Resolved 2001-06-01 → 2001-06-30
MCL Health-based Resolved 2001-06-01 → 2001-06-30
MCL Health-based Resolved 2001-06-01 → 2001-06-30
MCL Health-based Resolved 2001-06-01 → 2001-06-30

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 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
Nitrate
5100 µg/L 51%
of the EPA limit 10000 µg/L
 26/54 SYR4 2012–2019
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Copper
200 µg/L 15%
of the EPA limit 1300 µg/L
 13/15 SYR4 2013–2019
Lead
13 µg/L 87%
of the EPA limit 15 µg/L
 6/15 SYR4 2013–2019
Barium
180 µg/L 9%
of the EPA limit 2000 µg/L
 2/2 SYR4 2014–2018
Chloroform
4.3 µg/L
No EPA limit set
 2/3 SYR4 2013–2019
Fluoride
150 µg/L 3.8%
of the EPA limit 4000 µg/L
 2/2 SYR4 2014–2018
TTHM
4.3 µg/L 5.4%
of the EPA limit 80 µg/L
 2/3 SYR4 2013–2019
Bromodichloromethane
0.8000 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
Combined Radium (-226 And -228)
2.3 pCi/L 46%
of the EPA limit 5 pCi/L
 1/2 SYR4 2014–2017
Dibromochloromethane
0.6000 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
Dichloroacetic Acid
2 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
Trichloroacetic Acid
2 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
49 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebDiquatEthylbenzeneGlyphosateLassoMercuryMonobromoacetic AcidMonochloroacetic AcidPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)TrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
OAK VALLEY
Phone
319-310-3227
Email
midcountywateriowa@gmail.com

Frequently asked questions about Oak Valley

Is Oak Valley tap water safe to drink?

EPA monitoring detected 13 contaminants in Oak Valley'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 Oak Valley's water?

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

How many people does Oak Valley serve?

Oak Valley reports serving 100 people in Iowa, per its EPA record.

Has Oak Valley had any water quality violations?

The EPA has 184 violations on file for Oak Valley, of which 26 are health-based (a contaminant limit or required treatment was breached) and 10 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.