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Tap water quality report

Coggon Water Department

EPA monitoring tested this supplier for 49 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

49
contaminants tested
10
detected
701
people served
0
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Linn

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
170
violations on file
0
still open
ViolationTypeStatusPeriod
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-11-01 → 2025-11-30
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31
MON Monitoring Resolved 2025-03-01 → 2025-03-31

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
89.175 µg/L 6.9%
of the EPA limit 1300 µg/L
worst single sample: 90.6 µg/L
20/20 SYR4 2014–2017
Nitrate
2700 µg/L 27%
of the EPA limit 10000 µg/L
 14/34 SYR4 2012–2019
Lead
0.0058 mg/L 39%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Lead
5.24 µg/L 35%
of the EPA limit 15 µg/L
worst single sample: 6.5 µg/L
8/20 SYR4 2014–2017
Barium
133.55 µg/L 6.7%
of the EPA limit 2000 µg/L
worst single sample: 134 µg/L
2/2 SYR4 2015–2016
Fluoride
195 µg/L 4.9%
of the EPA limit 4000 µg/L
worst single sample: 200 µg/L
2/2 SYR4 2015–2016
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/2 SYR4 2015–2016
Combined Radium (-226 And -228)
2.1 pCi/L 42%
of the EPA limit 5 pCi/L
 1/3 SYR4 2012–2017
Selenium
5.2 µg/L 10%
of the EPA limit 50 µg/L
 1/2 SYR4 2015–2016
Toluene
6.42 µg/L 0.6%
of the EPA limit 1000 µg/L
 1/10 SYR4 2012–2019
39 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)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylbenzeneGlyphosateLassoMercuryPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
COGGON WATER DEPARTMENT
Phone
319-480-3203
Email
[email protected]

Frequently asked questions about Coggon Water Department

Is Coggon Water Department tap water safe to drink?

EPA monitoring detected 10 contaminants in Coggon 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 Coggon Water Department's water?

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

How many people does Coggon Water Department serve?

Coggon Water Department reports serving 701 people in Iowa, per its EPA record.

Has Coggon Water Department had any water quality violations?

The EPA has 170 violations on file for Coggon 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.