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Community Water System · PWS IA2915000

Danville Water Supply

Muscatine, Iowa 52761 - drinking water served from surface water sources to 923 people, tracked in EPA SDWIS and UCMR5.

923
People served
83
EPA violations
64
Health-based
Untested
UCMR5 result

The verdict

EPA records 83 drinking-water violations at Danville Water Supply, 77% of them health-based - above the Iowa per-system average.

83
Total EPA violations on record
77%
Health-based (MCL / treatment failure)
923
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Danville Water Supply

Danville Water Supply is a local-owned community water system that delivers drinking water to 923 residents in Muscatine, Iowa (Des Moines County) through 398 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 83 total violations for this system , of which 64 (77%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 13 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is TTHM, recorded in 53 violations (MCL, health-based). 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%).

Danville Water Supply's 83 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
923
Total Violations
83
Health-Based Violations
64
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
398
County
Des Moines
School/Daycare
No
MCL Violations
62
Monitoring Violations
13
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 53 2014
Total Haloacetic Acids (HAA5) MR 8 2023
Fluoride MCL 4 1983
TTHM MR 4 2023
Combined Radium (-226 and -228) MCL 3 1983
Gross Alpha, Excl. Radon and U MCL 2 1983
Groundwater Rule TT 2 2024
Combined Radium (-226 and -228) MR 1 1983

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 Danville 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 IA2915000 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
2024 Groundwater Rule TT 2 SDWIS / IA2915000 / 0700
2023 Total Haloacetic Acids (HAA5) MR 8 SDWIS / IA2915000 / 2456
2023 TTHM MR 4 SDWIS / IA2915000 / 2950
2014 TTHM MCL 53 SDWIS / IA2915000 / 2950
1983 Fluoride MCL 4 SDWIS / IA2915000 / 1025
1983 Combined Radium (-226 and -228) MCL 3 SDWIS / IA2915000 / 4010
1983 Gross Alpha, Excl. Radon and U MCL 2 SDWIS / IA2915000 / 4000
1983 Combined Radium (-226 and -228) MR 1 SDWIS / IA2915000 / 4010

How Danville Water Supply Compares

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

Metric Danville Water Supply Iowa avg Federal benchmark
Total violations 83 77 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 64 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 923 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 Danville Water Supply water safe to drink? ▼
Danville Water Supply (PWS ID: IA2915000) has 83 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 923 people using Surface Water sources.
How many people does Danville Water Supply serve? ▼
Danville Water Supply serves 923 people in Muscatine, Iowa. It is a Local-owned system using Surface Water water sources with 398 service connections.
What type of violations does Danville Water Supply have? ▼
Danville Water Supply has 83 total violations: 64 health-based violations (MCL exceedances or treatment failures), 13 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Danville Water Supply water? ▼
No PFAS testing data is available for Danville Water Supply under the EPA's UCMR5 monitoring program.
What water source does Danville Water Supply use? ▼
Danville 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.