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Tap water quality report

Oelwein Municipal Water Works

EPA monitoring tested this supplier for 90 contaminants and detected 7. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

90
contaminants tested
7
detected
5,920
people served
9
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Fayette

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.

9
health-based violations
34
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MCL Health-based Resolved 1995-06-01 → 1995-06-30
MR Monitoring Resolved 2014-04-01 → 2015-03-31

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
Copper
144 µg/L 11%
of the EPA limit 1300 µg/L
worst single sample: 265 µg/L
61/61 SYR4 2013–2019
Lead
16.8 µg/L 112%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 55.9 µg/L
51/61 SYR4 2013–2019
Lead
0.0042 mg/L 28%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Combined Radium (-226 And -228)
3.83 pCi/L 77%
of the EPA limit 5 pCi/L
worst single sample: 4.1 pCi/L
7/7 SYR4 2012–2018
Barium
42.04 µg/L 2.1%
of the EPA limit 2000 µg/L
worst single sample: 42.3 µg/L
3/3 SYR4 2012
Fluoride
924.5 µg/L 23%
of the EPA limit 4000 µg/L
worst single sample: 927 µg/L
3/3 SYR4 2012
Lithium
28 µg/L
No EPA limit set
 3/3 UCMR-5 2025
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBenzeneBenzo(A)PyreneBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitratePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
OELWEIN MUNICIPAL WATER WORKS
Phone
319-283-1197
Email
[email protected]

Frequently asked questions about Oelwein Municipal Water Works

Is Oelwein Municipal Water Works tap water safe to drink?

EPA monitoring detected 7 contaminants in Oelwein Municipal Water Works'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 Oelwein Municipal Water Works's water?

EPA monitoring detected Copper, Lead, Lead, Combined Radium (-226 And -228), Barium, and others. The full list with the level and data source for each is above.

How many people does Oelwein Municipal Water Works serve?

Oelwein Municipal Water Works reports serving 5,920 people in Iowa, per its EPA record.

Has Oelwein Municipal Water Works had any water quality violations?

The EPA has 34 violations on file for Oelwein Municipal Water Works, of which 9 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.