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CHESTER WATER SUPPLY

PWS ID: IA4509024 · RICEVILLE, Iowa 50466

CHESTER WATER SUPPLY serves 139 people in RICEVILLE, Iowa using Groundwater water sources. It has 209 recorded EPA violations, including 10 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CHESTER WATER SUPPLY

CHESTER WATER SUPPLY is a local-owned community water system that delivers drinking water to 139 residents in RICEVILLE, Iowa (Howard County) through 76 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 209 total violations for this system , of which 10 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 168 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 22 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. CHESTER WATER SUPPLY's 209 violations sit above 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
139
Total Violations
209
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
76
County
Howard
School/Daycare
No
MCL Violations
10
Monitoring Violations
168
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 22 2012
Coliform (TCR) MCL 10 1995
Revised Total Coliform Rule MON 8 2019
Atrazine MR 4 1995
2,4-D MR 4 1995
Dalapon MR 4 1995
Dinoseb MR 4 1995
Pentachlorophenol MR 4 1995
Simazine MR 4 1995
2,4,5-TP MR 4 1995
o-Dichlorobenzene MR 4 1995
cis-1,2-Dichloroethylene MR 4 1995
1,1-Dichloroethylene MR 4 1995
trans-1,2-Dichloroethylene MR 4 1995
DICHLOROMETHANE MR 4 1995
1,2-Dichloropropane MR 4 1995
CHLOROBENZENE MR 4 1995
1,1,1-Trichloroethane MR 4 1995
1,1,2-Trichloroethane MR 4 1995
Trichloroethylene MR 4 1995
Vinyl chloride MR 4 1995
LASSO MR 4 1995
1,2-Dichloroethane MR 4 1995
1,2,4-Trichlorobenzene MR 4 1995
Carbon tetrachloride MR 4 1995
Benzo(a)pyrene MR 4 1995
Ethylbenzene MR 4 1995
Picloram MR 4 1995
p-Dichlorobenzene MR 4 1995
Tetrachloroethylene MR 4 1995

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 CHESTER 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 IA4509024 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
2025 Total Haloacetic Acids (HAA5) MR 1 SDWIS / IA4509024 / 2456
2025 TTHM MR 1 SDWIS / IA4509024 / 2950
2019 Revised Total Coliform Rule MON 8 SDWIS / IA4509024 / 8000
2018 Nitrate MR 4 SDWIS / IA4509024 / 1040
2012 Coliform (TCR) MR 22 SDWIS / IA4509024 / 3100
1995 Coliform (TCR) MCL 10 SDWIS / IA4509024 / 3100
1995 Atrazine MR 4 SDWIS / IA4509024 / 2050
1995 2,4-D MR 4 SDWIS / IA4509024 / 2105
1995 Dalapon MR 4 SDWIS / IA4509024 / 2031
1995 Dinoseb MR 4 SDWIS / IA4509024 / 2041
1995 Pentachlorophenol MR 4 SDWIS / IA4509024 / 2326
1995 Simazine MR 4 SDWIS / IA4509024 / 2037
1995 2,4,5-TP MR 4 SDWIS / IA4509024 / 2110
1995 o-Dichlorobenzene MR 4 SDWIS / IA4509024 / 2968
1995 cis-1,2-Dichloroethylene MR 4 SDWIS / IA4509024 / 2380

How CHESTER WATER SUPPLY Compares

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

Metric CHESTER WATER SUPPLY Iowa avg Federal benchmark
Total violations 209 77 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 10 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 139 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 CHESTER WATER SUPPLY water safe to drink? ▼
CHESTER WATER SUPPLY (PWS ID: IA4509024) has 209 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 139 people using Groundwater sources.
How many people does CHESTER WATER SUPPLY serve? ▼
CHESTER WATER SUPPLY serves 139 people in RICEVILLE, Iowa. It is a Local-owned system using Groundwater water sources with 76 service connections.
What type of violations does CHESTER WATER SUPPLY have? ▼
CHESTER WATER SUPPLY has 209 total violations: 10 health-based violations (MCL exceedances or treatment failures), 168 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CHESTER WATER SUPPLY water? ▼
No PFAS testing data is available for CHESTER WATER SUPPLY under the EPA's UCMR5 monitoring program.
What water source does CHESTER WATER SUPPLY use? ▼
CHESTER 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. This data is provided for informational purposes only.

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

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