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Tap water quality report

Ottosen Water Supply

EPA monitoring tested this supplier for 59 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

59
contaminants tested
9
detected
41
people served
4
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Humboldt

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.

4
health-based violations
33
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MCL Health-based Resolved 1998-09-01 → 1998-09-30
MON Monitoring Resolved 2020-11-01 → 2020-11-30
MON Monitoring Resolved 2020-11-01 → 2020-11-30
MON Monitoring Resolved 2020-11-01 → 2020-11-30
MON Monitoring Resolved 2020-11-01 → 2020-11-30
MON Monitoring Resolved 2020-11-01 → 2020-11-30
MR Monitoring Resolved 2020-10-01 → 2021-09-30

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
0.0120 mg/L 80%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Copper
400 µg/L 31%
of the EPA limit 1300 µg/L
worst single sample: 440 µg/L
6/15 SYR4 2013–2019
Nitrate
800 µg/L 8%
of the EPA limit 10000 µg/L
 6/18 SYR4 2012–2019
Arsenic
5 µg/L 50%
of the EPA limit 10 µg/L
 4/4 SYR4 2014–2018
Lead
3.9 µg/L 26%
of the EPA limit 15 µg/L
worst single sample: 4 µg/L
3/15 SYR4 2013–2019
Combined Radium (-226 And -228)
5.29 pCi/L 106%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 5.4 pCi/L
2/2 SYR4 2014–2017
Barium
140 µg/L 7%
of the EPA limit 2000 µg/L
 1/1 SYR4 2015
Dichloroacetic Acid
1 µg/L
No EPA limit set
 1/2 SYR4 2013–2016
Fluoride
360 µg/L 9%
of the EPA limit 4000 µg/L
 1/1 SYR4 2015
50 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, TotalAtrazineBenzeneBenzo(A)PyreneBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebEthylbenzeneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
OTTOSEN WATER SUPPLY
Phone
515-320-1122
Email
[email protected]

Frequently asked questions about Ottosen Water Supply

Is Ottosen Water Supply tap water safe to drink?

EPA monitoring detected 9 contaminants in Ottosen 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 Ottosen Water Supply's water?

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

How many people does Ottosen Water Supply serve?

Ottosen Water Supply reports serving 41 people in Iowa, per its EPA record.

Has Ottosen Water Supply had any water quality violations?

The EPA has 33 violations on file for Ottosen Water Supply, of which 4 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.