Question 1

Is Coggon Water Department water safe to drink?

Accepted Answer

Coggon Water Department (PWS ID: IA5722053) has 165 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 701 people using Groundwater sources.

Question 2

How many people does Coggon Water Department serve?

Accepted Answer

EPA SDWIS reports that Coggon Water Department serves 701 people (this public water system's service population, not the municipal population of Coggon or any other city). It is a Local-owned system using Groundwater water sources with 306 service connections. The operator address is listed in Coggon, Iowa.

Question 3

What type of violations does Coggon Water Department have?

Accepted Answer

Coggon Water Department has 165 total violations: 0 health-based violations (MCL exceedances or treatment failures), 164 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Coggon Water Department water?

Accepted Answer

No PFAS testing data is available for Coggon Water Department under the EPA's UCMR5 monitoring program.

Question 5

What water source does Coggon Water Department use?

Accepted Answer

Coggon Water Department uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

Where does Coggon Water Department sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Coggon Water Department ranks #24,229 of 29,740 by people served, and #458 of 545 in Iowa. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Coggon Water Department's violation count compare nationally?

Accepted Answer

Coggon Water Department has 165 recorded EPA SDWIS violations, fewer than 17% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 82% of that cohort has fewer violations than Coggon Water Department. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
Nitrate	MR	12	2023
LASSO	MR	10	2013
Revised Total Coliform Rule	MON	9	2025
Atrazine	MR	9	2013
Gross Alpha, Excl. Radon and U	MR	4	2017
Combined Radium (-226 and -228)	MR	4	2017
2,4-D	MR	4	2013
Di(2-ethylhexyl) adipate	MR	4	2013
Pentachlorophenol	MR	4	2013
Picloram	MR	4	2013
Diquat	MR	4	2013
Glyphosate	MR	4	2013
Benzene	MR	4	2013
Carbon tetrachloride	MR	4	2013
o-Dichlorobenzene	MR	4	2013
p-Dichlorobenzene	MR	4	2013
1,2-Dichloroethane	MR	4	2013
cis-1,2-Dichloroethylene	MR	4	2013
trans-1,2-Dichloroethylene	MR	4	2013
DICHLOROMETHANE	MR	4	2013
Styrene	MR	4	2013
Tetrachloroethylene	MR	4	2013
1,2,4-Trichlorobenzene	MR	4	2013
1,1,1-Trichloroethane	MR	4	2013
Trichloroethylene	MR	4	2013
Lead and Copper Rule	MR	4	2023
1,2-Dichloropropane	MR	4	2013
Simazine	MR	4	2013
1,1,2-Trichloroethane	MR	4	2013
CHLOROBENZENE	MR	4	2013

Coggon Water Department

Coggon Water Department standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Coggon Water Department

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints