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Community Water System · PWS IL1730150

Herrick

Herrick, Illinois 62431 - drinking water served from groundwater sources to 358 people, tracked in EPA SDWIS and UCMR5.

358
People served
519
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 519 drinking-water violations at Herrick, 1% of them health-based - above the Illinois per-system average.

519
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
358
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Herrick

Herrick is a local-owned community water system that delivers drinking water to 358 residents in Herrick, Illinois (Shelby County) through 280 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 519 total violations for this system , of which 4 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 470 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 45 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 Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 123 of 487 UCMR5-tested systems have reported PFAS detections (25.3%).

Herrick's 519 violations sit above the Illinois 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
358
Total Violations
519
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
280
County
Shelby
School/Daycare
No
MCL Violations
0
Monitoring Violations
470
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 45 2013
Consumer Confidence Rule Other 22 2022
Chlorine MR 18 2013
p-Dichlorobenzene MR 14 1993
1,1-Dichloroethylene MR 14 1993
Carbon tetrachloride MR 14 1993
Trichloroethylene MR 14 1993
1,1,1-Trichloroethane MR 14 1993
Benzene MR 14 1993
1,2-Dichloroethane MR 14 1993
o-Dichlorobenzene MR 12 1993
trans-1,2-Dichloroethylene MR 12 1993
1,2-Dichloropropane MR 12 1993
CHLOROBENZENE MR 12 1993
Toluene MR 12 1993
cis-1,2-Dichloroethylene MR 12 1993
Tetrachloroethylene MR 12 1993
Styrene MR 12 1993
Ethylbenzene MR 12 1993
Xylenes, Total MR 12 1993
Lead and Copper Rule MR 9 2022
Nitrate MR 4 2004
CYANIDE MR 4 2002
Mercury MR 4 2002
Thallium, Total MR 4 2002
Selenium MR 4 2002
Endrin MR 4 2020
Toxaphene MR 4 2020
Dalapon MR 4 2020
Diquat MR 4 2020

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 Herrick.

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 IL1730150 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Herrick under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

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 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / IL1730150 / 5200
2025 Total Haloacetic Acids (HAA5) MR 1 SDWIS / IL1730150 / 2456
2023 Lead and Copper Rule TT 4 SDWIS / IL1730150 / 5000
2022 Consumer Confidence Rule Other 22 SDWIS / IL1730150 / 7000
2022 Lead and Copper Rule MR 9 SDWIS / IL1730150 / 5000
2020 Endrin MR 4 SDWIS / IL1730150 / 2005
2020 Toxaphene MR 4 SDWIS / IL1730150 / 2020
2020 Dalapon MR 4 SDWIS / IL1730150 / 2031
2020 Diquat MR 4 SDWIS / IL1730150 / 2032
2020 Endothall MR 4 SDWIS / IL1730150 / 2033
2020 OXAMYL MR 4 SDWIS / IL1730150 / 2036
2020 Simazine MR 4 SDWIS / IL1730150 / 2037
2020 Picloram MR 4 SDWIS / IL1730150 / 2040
2020 Dinoseb MR 4 SDWIS / IL1730150 / 2041
2020 Aldicarb sulfoxide MR 4 SDWIS / IL1730150 / 2043

How Herrick Compares

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

Metric Herrick Illinois avg Federal benchmark
Total violations 519 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 25.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 358 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

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 Herrick water safe to drink? ▼
Herrick (PWS ID: IL1730150) has 519 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 358 people using Groundwater sources.
How many people does Herrick serve? ▼
Herrick serves 358 people in Herrick, Illinois. It is a Local-owned system using Groundwater water sources with 280 service connections.
What type of violations does Herrick have? ▼
Herrick has 519 total violations: 4 health-based violations (MCL exceedances or treatment failures), 470 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Herrick water? ▼
No PFAS testing data is available for Herrick under the EPA's UCMR5 monitoring program.
What water source does Herrick use? ▼
Herrick 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.
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.