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Community Water System · PWS IL0730100

Andover

Andover, Illinois 61233 - drinking water served from groundwater sources to 565 people, tracked in EPA SDWIS and UCMR5.

565
People served
314
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 314 drinking-water violations at Andover - above the Illinois per-system average.

314
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
565
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Andover

Andover is a local-owned community water system that delivers drinking water to 565 residents in Andover, Illinois (Henry County) through 250 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 314 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 259 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 57 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, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Andover's 314 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
565
Total Violations
314
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
250
County
Henry
School/Daycare
No
MCL Violations
0
Monitoring Violations
259
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 57 2005
cis-1,2-Dichloroethylene MR 10 2004
o-Dichlorobenzene MR 10 2004
Trichloroethylene MR 10 2004
Tetrachloroethylene MR 10 2004
CHLOROBENZENE MR 10 2004
Toluene MR 10 2004
Ethylbenzene MR 10 2004
Styrene MR 10 2004
Xylenes, Total MR 10 2004
p-Dichlorobenzene MR 10 2004
trans-1,2-Dichloroethylene MR 10 2004
1,2-Dichloroethane MR 10 2004
1,2-Dichloropropane MR 10 2004
Benzene MR 10 2004
1,1-Dichloroethylene MR 10 2004
1,1,1-Trichloroethane MR 10 2004
Carbon tetrachloride MR 10 2004
Chlorine MR 8 2004
Nitrate MR 6 1993
DICHLOROMETHANE MR 4 2004
CYANIDE MR 4 2002
1,1,2-Trichloroethane MR 4 2004
1,2,4-Trichlorobenzene MR 4 2004
Consumer Confidence Rule Other 3 2025
Gross Alpha, Excl. Radon and U MR 1 1977
Nitrite MR 1 2005

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 Andover.

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 IL0730100 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 Andover 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 Consumer Confidence Rule Other 3 SDWIS / IL0730100 / 7000
2005 Coliform (TCR) MR 57 SDWIS / IL0730100 / 3100
2005 Nitrite MR 1 SDWIS / IL0730100 / 1041
2004 cis-1,2-Dichloroethylene MR 10 SDWIS / IL0730100 / 2380
2004 o-Dichlorobenzene MR 10 SDWIS / IL0730100 / 2968
2004 Trichloroethylene MR 10 SDWIS / IL0730100 / 2984
2004 Tetrachloroethylene MR 10 SDWIS / IL0730100 / 2987
2004 CHLOROBENZENE MR 10 SDWIS / IL0730100 / 2989
2004 Toluene MR 10 SDWIS / IL0730100 / 2991
2004 Ethylbenzene MR 10 SDWIS / IL0730100 / 2992
2004 Styrene MR 10 SDWIS / IL0730100 / 2996
2004 Xylenes, Total MR 10 SDWIS / IL0730100 / 2955
2004 p-Dichlorobenzene MR 10 SDWIS / IL0730100 / 2969
2004 trans-1,2-Dichloroethylene MR 10 SDWIS / IL0730100 / 2979
2004 1,2-Dichloroethane MR 10 SDWIS / IL0730100 / 2980

How Andover Compares

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

Metric Andover Illinois avg Federal benchmark
Total violations 314 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 565 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 Andover water safe to drink? ▼
Andover (PWS ID: IL0730100) has 314 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 565 people using Groundwater sources.
How many people does Andover serve? ▼
Andover serves 565 people in Andover, Illinois. It is a Local-owned system using Groundwater water sources with 250 service connections.
What type of violations does Andover have? ▼
Andover has 314 total violations: 0 health-based violations (MCL exceedances or treatment failures), 259 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Andover water? ▼
No PFAS testing data is available for Andover under the EPA's UCMR5 monitoring program.
What water source does Andover use? ▼
Andover 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.