Is Osage Municipal Water Supply Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Mitchell

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Resolved	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2009-08-01 → 2009-08-31
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-09-01 → 2002-09-30
MCL	Health-based	Resolved	2002-08-01 → 2002-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
PFHXS	0.0043 µg/L	2/8	2024
PFOS	0.0042 µg/L	1/8	2024

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	9600 µg/L 96% of the EPA limit 10000 µg/L worst single sample: 10200 µg/L	208/224	SYR4	2012–2019
Copper	541.3 µg/L 42% of the EPA limit 1300 µg/L worst single sample: 881 µg/L	60/60	SYR4	2012–2018
Lead	19.32 µg/L 129% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 227 µg/L	37/60	SYR4	2012–2018
Lead	0.0114 mg/L 76% of the EPA limit 0.0150 mg/L	15/15	LCR	2024
Dibromochloromethane	4.426 µg/L No EPA limit set worst single sample: 4.45 µg/L	7/7	SYR4	2013–2019
Bromodichloromethane	6.0375 µg/L No EPA limit set worst single sample: 6.14 µg/L	6/7	SYR4	2013–2019
Dibromoacetic Acid	2.3025 µg/L No EPA limit set worst single sample: 2.36 µg/L	6/7	SYR4	2013–2019
TTHM	18.425 µg/L 23% of the EPA limit 80 µg/L worst single sample: 18.6 µg/L	6/7	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	15.25 µg/L 25% of the EPA limit 60 µg/L worst single sample: 16.5 µg/L	6/7	SYR4	2013–2019
Trichloroacetic Acid	1.2625 µg/L No EPA limit set worst single sample: 1.29 µg/L	6/7	SYR4	2013–2019
Bromoform	2.814 µg/L No EPA limit set worst single sample: 2.93 µg/L	5/7	SYR4	2013–2019
Chloroform	7.452 µg/L No EPA limit set worst single sample: 7.79 µg/L	5/7	SYR4	2013–2019
Dichloroacetic Acid	4.27 µg/L No EPA limit set worst single sample: 4.33 µg/L	5/7	SYR4	2013–2019
Monochloroacetic Acid	8.156 µg/L No EPA limit set worst single sample: 9.04 µg/L	5/7	SYR4	2013–2019

65 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-PF3ONSAdonaAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCarbon TetrachlorideCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: OSAGE MUNICIPAL WATER SUPPLY
Phone: 641-732-3709
Email: [email protected]

Frequently asked questions about Osage Municipal Water Supply

Is Osage Municipal Water Supply tap water safe to drink?

EPA monitoring detected 16 contaminants in Osage Municipal Water Supply'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 Osage Municipal Water Supply's water?

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

How many people does Osage Municipal Water Supply serve?

Osage Municipal Water Supply reports serving 3,637 people in Iowa, per its EPA record.

Has Osage Municipal Water Supply had any water quality violations?

The EPA has 57 violations on file for Osage Municipal Water Supply, of which 48 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.