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Marengo Water Supply

EPA monitoring tested this supplier for 60 contaminants and detected 18. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

60
contaminants tested
18
detected
2,435
people served
8
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Iowa

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.

8
health-based violations
87
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2006-10-01 → 2006-10-31
MCL Health-based Resolved 2006-10-01 → 2006-10-31
MCL Health-based Resolved 2006-10-01 → 2006-10-31
MCL Health-based Resolved 2006-10-01 → 2006-10-31
MCL Health-based Resolved 1997-07-01 → 1997-07-31
MCL Health-based Resolved 1997-07-01 → 1997-07-31
MCL Health-based Resolved 1997-07-01 → 1997-07-31
MCL Health-based Resolved 1997-07-01 → 1997-07-31
MR Monitoring Resolved 2019-08-01 → 2019-08-31
MR Monitoring Resolved 2019-08-01 → 2019-08-31

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
413.55 µg/L 32%
of the EPA limit 1300 µg/L
worst single sample: 462 µg/L
20/20 SYR4 2014–2017
Lead
0.0012 mg/L 8%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2023
Dibromoacetic Acid
2.351 µg/L
No EPA limit set
worst single sample: 2.54 µg/L
7/7 SYR4 2013–2019
Dichloroacetic Acid
9.129 µg/L
No EPA limit set
worst single sample: 9.39 µg/L
7/7 SYR4 2013–2019
Bromodichloromethane
8.7575 µg/L
No EPA limit set
worst single sample: 8.79 µg/L
6/7 SYR4 2013–2019
Chloroform
28.475 µg/L
No EPA limit set
worst single sample: 29.3 µg/L
6/7 SYR4 2013–2019
Dibromochloromethane
5.9875 µg/L
No EPA limit set
worst single sample: 6.24 µg/L
6/7 SYR4 2013–2019
Lead
3.375 µg/L 23%
of the EPA limit 15 µg/L
worst single sample: 3.6 µg/L
6/20 SYR4 2014–2017
Monochloroacetic Acid
13 µg/L
No EPA limit set
worst single sample: 13.8 µg/L
6/7 SYR4 2013–2019
Nitrate
1000 µg/L 10%
of the EPA limit 10000 µg/L
 6/16 SYR4 2012–2019
TTHM
40.075 µg/L 50%
of the EPA limit 80 µg/L
worst single sample: 40.2 µg/L
6/7 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
24.4 µg/L 41%
of the EPA limit 60 µg/L
worst single sample: 25.2 µg/L
6/7 SYR4 2013–2019
Trichloroacetic Acid
4.4125 µg/L
No EPA limit set
worst single sample: 4.48 µg/L
6/7 SYR4 2013–2019
Bromoform
1.5725 µg/L
No EPA limit set
worst single sample: 1.7 µg/L
4/7 SYR4 2013–2019
Barium
97.4 µg/L 4.9%
of the EPA limit 2000 µg/L
 1/1 SYR4 2016
Combined Radium (-226 And -228)
1.8 pCi/L 36%
of the EPA limit 5 pCi/L
 1/1 SYR4 2018
Fluoride
200 µg/L 5%
of the EPA limit 4000 µg/L
 1/1 SYR4 2016
Selenium
3.1 µg/L 6.2%
of the EPA limit 50 µg/L
 1/1 SYR4 2016
42 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, TotalArsenicAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylbenzeneGlyphosateLassoMercuryMonobromoacetic AcidPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARENGO WATER SUPPLY
Phone
319-521-7043
Email
[email protected]

Frequently asked questions about Marengo Water Supply

Is Marengo Water Supply tap water safe to drink?

EPA monitoring detected 18 contaminants in Marengo 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 Marengo Water Supply's water?

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

How many people does Marengo Water Supply serve?

Marengo Water Supply reports serving 2,435 people in Iowa, per its EPA record.

Has Marengo Water Supply had any water quality violations?

The EPA has 87 violations on file for Marengo Water Supply, of which 8 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.