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Community Water System · PWS IA9334078

Corydon Water Supply

Corydon, Iowa 50060 - drinking water served from surface water sources to 1,610 people, tracked in EPA SDWIS and UCMR5.

1,610
People served
1,441
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 1,441 drinking-water violations at Corydon Water Supply - above the Iowa per-system average.

1,441
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
1,610
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Corydon Water Supply

Corydon Water Supply is a local-owned community water system that delivers drinking water to 1,610 residents in Corydon, Iowa (Wayne County) through 850 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 1,441 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 841 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Carbon tetrachloride, recorded in 43 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Iowa, EPA tracks 1,795 public water systems serving 3,114,444 people, with 138,271 cumulative violations and 27,946 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 77 violations. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%).

Corydon Water Supply's 1,441 violations sit above the Iowa average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,610
Total Violations
1,441
Health-Based Violations
0
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
850
County
Wayne
School/Daycare
No
MCL Violations
0
Monitoring Violations
841
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Carbon tetrachloride MR 43 1993
Tetrachloroethylene MR 43 1993
CHLOROBENZENE MR 43 1993
Xylenes, Total MR 43 1993
1,1,1-Trichloroethane MR 43 1993
Styrene MR 43 1993
p-Dichlorobenzene MR 43 1993
cis-1,2-Dichloroethylene MR 42 1993
1,2-Dichloropropane MR 42 1993
Trichloroethylene MR 41 1993
1,1-Dichloroethylene MR 39 1993
trans-1,2-Dichloroethylene MR 39 1993
Toluene MR 39 1993
Ethylbenzene MR 39 1993
1,2-Dichloroethane MR 39 1993
1,1,2-Trichloroethane MR 39 1993
Benzene MR 39 1993
o-Dichlorobenzene MR 38 1993
DICHLOROMETHANE MR 36 1993
Atrazine MR 11 1993
Arsenic MR 5 1990
Cadmium MR 5 1990
Chromium MR 5 1990
Fluoride MR 5 1990
Lead and Copper Rule MR 5 1991
Mercury MR 5 1990
Barium MR 5 1990
Revised Total Coliform Rule MON 5 2021
Selenium MR 5 1990
Nitrate MR 4 1989

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Corydon Water Supply.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IA9334078 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Iowa Drinking Water Authority

Iowa's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find IA regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2021 Revised Total Coliform Rule MON 5 SDWIS / IA9334078 / 8000
2019 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IA9334078 / 2456
2019 TTHM MR 4 SDWIS / IA9334078 / 2950
1993 Carbon tetrachloride MR 43 SDWIS / IA9334078 / 2982
1993 Tetrachloroethylene MR 43 SDWIS / IA9334078 / 2987
1993 CHLOROBENZENE MR 43 SDWIS / IA9334078 / 2989
1993 Xylenes, Total MR 43 SDWIS / IA9334078 / 2955
1993 1,1,1-Trichloroethane MR 43 SDWIS / IA9334078 / 2981
1993 Styrene MR 43 SDWIS / IA9334078 / 2996
1993 p-Dichlorobenzene MR 43 SDWIS / IA9334078 / 2969
1993 cis-1,2-Dichloroethylene MR 42 SDWIS / IA9334078 / 2380
1993 1,2-Dichloropropane MR 42 SDWIS / IA9334078 / 2983
1993 Trichloroethylene MR 41 SDWIS / IA9334078 / 2984
1993 1,1-Dichloroethylene MR 39 SDWIS / IA9334078 / 2977
1993 trans-1,2-Dichloroethylene MR 39 SDWIS / IA9334078 / 2979

How Corydon Water Supply Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Corydon Water Supply Iowa avg Federal benchmark
Total violations 1,441 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 15.6 Indicates a contaminant exceeded a federal MCL
PFAS detection None 83.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,610 1,735 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,795 regulated public water systems in Iowa.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Corydon Water Supply water safe to drink? ▼
Corydon Water Supply (PWS ID: IA9334078) has 1441 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,610 people using Surface Water sources.
How many people does Corydon Water Supply serve? ▼
Corydon Water Supply serves 1,610 people in Corydon, Iowa. It is a Local-owned system using Surface Water water sources with 850 service connections.
What type of violations does Corydon Water Supply have? ▼
Corydon Water Supply has 1,441 total violations: 0 health-based violations (MCL exceedances or treatment failures), 841 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Corydon Water Supply water? ▼
No PFAS testing data is available for Corydon Water Supply under the EPA's UCMR5 monitoring program.
What water source does Corydon Water Supply use? ▼
Corydon Water Supply uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.