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Tap water quality report

Mahaska Rural Water System, Inc.

EPA monitoring tested this supplier for 80 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

80
contaminants tested
15
detected
9,818
people served
12
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Private
Counties served
Mahaska

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.

12
health-based violations
21
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
TT Health-based Resolved 2016-04-01
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2015-08-01 → 2015-08-31
MCL Health-based Resolved 2002-12-01 → 2002-12-31
MCL Health-based Resolved 2002-12-01 → 2002-12-31

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 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
Fluoride
1000 µg/L 25%
of the EPA limit 4000 µg/L
worst single sample: 1300 µg/L
95/95 SYR4 2012–2019
Copper
32.495 µg/L 2.5%
of the EPA limit 1300 µg/L
worst single sample: 176 µg/L
38/41 SYR4 2014–2017
Nitrate
700 µg/L 7%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2023
Bromodichloromethane
12.9 µg/L
No EPA limit set
worst single sample: 13.2 µg/L
11/11 SYR4 2013–2019
Chloroform
24.2 µg/L
No EPA limit set
worst single sample: 27.2 µg/L
11/11 SYR4 2013–2019
Dibromochloromethane
8.65 µg/L
No EPA limit set
worst single sample: 9.02 µg/L
11/11 SYR4 2013–2019
Dichloroacetic Acid
7.41 µg/L
No EPA limit set
worst single sample: 7.78 µg/L
11/11 SYR4 2013–2019
TTHM
47.05 µg/L 59%
of the EPA limit 80 µg/L
worst single sample: 50 µg/L
11/11 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
23.6 µg/L 39%
of the EPA limit 60 µg/L
worst single sample: 26.6 µg/L
11/11 SYR4 2013–2019
Trichloroacetic Acid
2.895 µg/L
No EPA limit set
worst single sample: 3.09 µg/L
11/11 SYR4 2013–2019
Bromoform
2.035 µg/L
No EPA limit set
worst single sample: 2.26 µg/L
10/11 SYR4 2013–2019
Dibromoacetic Acid
3.3075 µg/L
No EPA limit set
worst single sample: 3.42 µg/L
10/11 SYR4 2013–2019
Monochloroacetic Acid
14.24 µg/L
No EPA limit set
worst single sample: 15 µg/L
9/11 SYR4 2013–2019
Lead
3.67 µg/L 24%
of the EPA limit 15 µg/L
worst single sample: 4 µg/L
4/41 SYR4 2014–2017
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-PF3ONSAdonaAsbestosAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCarbon TetrachlorideDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylbenzeneHfpo-DaLassoMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MAHASKA RURAL WATER SYSTEM INC
Phone
641-673-8851
Email
[email protected]

Frequently asked questions about Mahaska Rural Water System, Inc.

Is Mahaska Rural Water System, Inc. tap water safe to drink?

EPA monitoring detected 15 contaminants in Mahaska Rural Water System, Inc.'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 Mahaska Rural Water System, Inc.'s water?

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

How many people does Mahaska Rural Water System, Inc. serve?

Mahaska Rural Water System, Inc. reports serving 9,818 people in Iowa, per its EPA record.

Has Mahaska Rural Water System, Inc. had any water quality violations?

The EPA has 21 violations on file for Mahaska Rural Water System, Inc., of which 12 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.