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Tap water quality report

Iowa City Water Department

EPA monitoring tested this supplier for 90 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

90
contaminants tested
15
detected
68,753
people served
0
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Surface water
Ownership
Local government
Counties served
Johnson

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.

0
health-based violations
69
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2013-02-01 → 2013-02-28
MR Monitoring Resolved 2013-02-01 → 2013-02-28
MR Monitoring Resolved 2013-02-01 → 2013-02-28
MR Monitoring Resolved 2013-02-01 → 2013-02-28
MR Monitoring Resolved 2013-02-01 → 2013-02-28
MR Monitoring Resolved 2007-05-01 → 2007-05-31
MR Monitoring Resolved 2007-05-01 → 2007-05-31
MR Monitoring Resolved 2007-05-01 → 2007-05-31
MR Monitoring Resolved 2007-05-01 → 2007-05-31
MR Monitoring 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 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
Bromodichloromethane
15 µg/L
No EPA limit set
worst single sample: 21 µg/L
242/242 SYR4 2012–2019
Chloroform
36.95 µg/L
No EPA limit set
worst single sample: 46 µg/L
242/242 SYR4 2012–2019
Dibromochloromethane
9.695 µg/L
No EPA limit set
worst single sample: 12 µg/L
242/242 SYR4 2012–2019
Dichloroacetic Acid
10 µg/L
No EPA limit set
worst single sample: 15 µg/L
242/242 SYR4 2012–2019
TTHM
58.95 µg/L 74%
of the EPA limit 80 µg/L
worst single sample: 78 µg/L
242/242 SYR4 2012–2019
Dibromoacetic Acid
3 µg/L
No EPA limit set
worst single sample: 4 µg/L
240/242 SYR4 2012–2019
Bromoform
2.1 µg/L
No EPA limit set
worst single sample: 2.6 µg/L
228/242 SYR4 2012–2019
Nitrate
6200 µg/L 62%
of the EPA limit 10000 µg/L
worst single sample: 7200 µg/L
200/222 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
16 µg/L 27%
of the EPA limit 60 µg/L
worst single sample: 23 µg/L
197/242 SYR4 2012–2019
Trichloroacetic Acid
3.85 µg/L
No EPA limit set
worst single sample: 6 µg/L
184/242 SYR4 2012–2019
Lead
13.7 µg/L 91%
of the EPA limit 15 µg/L
worst single sample: 27 µg/L
44/60 SYR4 2014–2017
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
 25/60 SYR4 2014–2017
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
 12/12 LCR 2023
Lithium
47 µg/L
No EPA limit set
 3/4 UCMR-5 2023
Fluoride
610 µg/L 15%
of the EPA limit 4000 µg/L
 1/1 SYR4 2014
75 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, TotalArsenicAtrazineBariumBenzeneBenzo(A)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
IOWA CITY WATER DEPARTMENT
Phone
319-356-5169
Email
[email protected]

Frequently asked questions about Iowa City Water Department

Is Iowa City Water Department tap water safe to drink?

EPA monitoring detected 15 contaminants in Iowa City Water Department'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 Iowa City Water Department's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Iowa City Water Department serve?

Iowa City Water Department reports serving 68,753 people in Iowa, per its EPA record.

Has Iowa City Water Department had any water quality violations?

The EPA has 69 violations on file for Iowa City Water Department, of which 0 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.