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CLARKSVILLE WATER SUPPLY

PWS ID: IA1228038 · MARSHALLTOWN, Iowa 50158

CLARKSVILLE WATER SUPPLY serves 1,254 people in MARSHALLTOWN, Iowa using Groundwater water sources. It has 71 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CLARKSVILLE WATER SUPPLY

CLARKSVILLE WATER SUPPLY is a local-owned community water system that delivers drinking water to 1,254 residents in MARSHALLTOWN, Iowa (Butler County) through 613 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 71 total violations for this system , of which 1 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 22 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 Coliform (TCR), recorded in 12 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. CLARKSVILLE WATER SUPPLY's 71 violations sit below the Iowa average. Statewide, 127 of 152 UCMR5-tested systems have reported PFAS detections (83.6%). 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
1,254
Total Violations
71
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
613
County
Butler
School/Daycare
No
MCL Violations
1
Monitoring Violations
22
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 1992
Arsenic MR 4 2002
Nitrate MR 4 2014
Consumer Confidence Rule Other 3 2015
Lead and Copper Rule MR 2 2021
Nitrate MCL 1 1978

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
HFPO-DA 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/14/2023 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/14/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/14/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/14/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFOA 8/14/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/14/2023 <9 µg/L 9 µg/L Not Detected
PFTrDA 8/14/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 8/14/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/14/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/14/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/14/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/14/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/14/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/14/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 2/15/2023 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 2/15/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 2/15/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 2/15/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 2/15/2023 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 2/15/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 2/15/2023 <9 µg/L 9 µg/L Not Detected
PFHpA 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 2/15/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFOA 2/15/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 2/15/2023 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 2/15/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 2/15/2023 <0.003 µg/L 0.003 µg/L Not Detected

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 CLARKSVILLE 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 IA1228038 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 Lead and Copper Rule MR 2 SDWIS / IA1228038 / 5000
2015 Consumer Confidence Rule Other 3 SDWIS / IA1228038 / 7000
2014 Nitrate MR 4 SDWIS / IA1228038 / 1040
2002 Arsenic MR 4 SDWIS / IA1228038 / 1005
1992 Coliform (TCR) MR 12 SDWIS / IA1228038 / 3100
1978 Nitrate MCL 1 SDWIS / IA1228038 / 1040

How CLARKSVILLE WATER SUPPLY Compares

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

Metric CLARKSVILLE WATER SUPPLY Iowa avg Federal benchmark
Total violations 71 77 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 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 1,254 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CLARKSVILLE WATER SUPPLY water safe to drink? ▼
CLARKSVILLE WATER SUPPLY (PWS ID: IA1228038) has 71 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,254 people using Groundwater sources.
How many people does CLARKSVILLE WATER SUPPLY serve? ▼
CLARKSVILLE WATER SUPPLY serves 1,254 people in MARSHALLTOWN, Iowa. It is a Local-owned system using Groundwater water sources with 613 service connections.
What type of violations does CLARKSVILLE WATER SUPPLY have? ▼
CLARKSVILLE WATER SUPPLY has 71 total violations: 1 health-based violations (MCL exceedances or treatment failures), 22 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CLARKSVILLE WATER SUPPLY water? ▼
No. CLARKSVILLE WATER SUPPLY was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does CLARKSVILLE WATER SUPPLY use? ▼
CLARKSVILLE WATER SUPPLY uses Groundwater 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial