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Tap water quality report

De Witt Water Supply

EPA monitoring tested this supplier for 91 contaminants and detected 14. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

91
contaminants tested
14
detected
5,514
people served
13
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Clinton

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.

13
health-based violations
25
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 2003-08-01 → 2003-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31
MCL Health-based Resolved 1994-08-01 → 1994-08-31

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
347.3 µg/L 27%
of the EPA limit 1300 µg/L
worst single sample: 968 µg/L
60/60 SYR4 2013–2019
Nitrate
200 µg/L 2%
of the EPA limit 10000 µg/L
 24/46 SYR4 2012–2019
Lead
10.71 µg/L 71%
of the EPA limit 15 µg/L
worst single sample: 18.9 µg/L
15/60 SYR4 2013–2019
Lead
0.0034 mg/L 23%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2025
Combined Radium (-226 And -228)
3.81 pCi/L 76%
of the EPA limit 5 pCi/L
worst single sample: 3.9 pCi/L
7/7 SYR4 2012–2018
Lithium
110 µg/L
No EPA limit set
 6/6 UCMR-5 2023
Nitrite
520 µg/L 52%
of the EPA limit 1000 µg/L
worst single sample: 600 µg/L
5/16 SYR4 2017–2019
Barium
41.6 µg/L 2.1%
of the EPA limit 2000 µg/L
worst single sample: 42 µg/L
3/3 SYR4 2012–2013
Fluoride
1281 µg/L 32%
of the EPA limit 4000 µg/L
worst single sample: 1300 µg/L
3/3 SYR4 2012–2013
Arsenic
2.055 µg/L 21%
of the EPA limit 10 µg/L
worst single sample: 2.1 µg/L
2/3 SYR4 2012–2013
Dalapon
1.5 µg/L 0.8%
of the EPA limit 200 µg/L
 1/3 SYR4 2012–2016
Selenium
6.3 µg/L 13%
of the EPA limit 50 µg/L
 1/3 SYR4 2012–2013
TTHM
2 µg/L 2.5%
of the EPA limit 80 µg/L
 1/9 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6 µg/L 10%
of the EPA limit 60 µg/L
 1/9 SYR4 2012–2019
77 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, TotalAtrazineBenzeneBenzo(A)PyreneBromodichloromethaneBromoformChlorobenzeneCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
DE WITT WATER SUPPLY
Phone
563-659-5324
Email
[email protected]

Frequently asked questions about De Witt Water Supply

Is De Witt Water Supply tap water safe to drink?

EPA monitoring detected 14 contaminants in De Witt 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 De Witt Water Supply's water?

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

How many people does De Witt Water Supply serve?

De Witt Water Supply reports serving 5,514 people in Iowa, per its EPA record.

Has De Witt Water Supply had any water quality violations?

The EPA has 25 violations on file for De Witt Water Supply, of which 13 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.