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Community Water System · PWS IL0574620

London Mills

London Mills, Illinois 61544 - drinking water served from groundwater sources to 500 people, tracked in EPA SDWIS and UCMR5.

500
People served
94
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 94 drinking-water violations at London Mills, 4% of them health-based - above the Illinois per-system average.

94
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
500
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: London Mills

London Mills is a local-owned community water system that delivers drinking water to 500 residents in London Mills, Illinois (Fulton County) through 170 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 94 total violations for this system , of which 4 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 57 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 6 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%).

London Mills's 94 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
500
Total Violations
94
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
170
County
Fulton
School/Daycare
No
MCL Violations
4
Monitoring Violations
57
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 6 1995
Nitrate MR 6 2013
Coliform (TCR) MCL 4 1992
TTHM MR 4 2020
Benzo(a)pyrene MR 4 2020
LASSO MR 4 2020
Di(2-ethylhexyl) phthalate MR 4 2020
Atrazine MR 4 2020
Revised Total Coliform Rule MON 4 2023
Chlorine MR 4 2023
Diquat MR 4 2020
Di(2-ethylhexyl) adipate MR 4 2020
Total Haloacetic Acids (HAA5) MR 4 2020
Simazine MR 4 2020
Gross Alpha, Excl. Radon and U MR 1 1977

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 London Mills.

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 IL0574620 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 London Mills 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
2023 Revised Total Coliform Rule MON 4 SDWIS / IL0574620 / 8000
2023 Chlorine MR 4 SDWIS / IL0574620 / 0999
2020 TTHM MR 4 SDWIS / IL0574620 / 2950
2020 Benzo(a)pyrene MR 4 SDWIS / IL0574620 / 2306
2020 LASSO MR 4 SDWIS / IL0574620 / 2051
2020 Di(2-ethylhexyl) phthalate MR 4 SDWIS / IL0574620 / 2039
2020 Atrazine MR 4 SDWIS / IL0574620 / 2050
2020 Diquat MR 4 SDWIS / IL0574620 / 2032
2020 Di(2-ethylhexyl) adipate MR 4 SDWIS / IL0574620 / 2035
2020 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IL0574620 / 2456
2020 Simazine MR 4 SDWIS / IL0574620 / 2037
2013 Nitrate MR 6 SDWIS / IL0574620 / 1040
1995 Coliform (TCR) MR 6 SDWIS / IL0574620 / 3100
1992 Coliform (TCR) MCL 4 SDWIS / IL0574620 / 3100
1977 Gross Alpha, Excl. Radon and U MR 1 SDWIS / IL0574620 / 4000

How London Mills Compares

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

Metric London Mills Illinois avg Federal benchmark
Total violations 94 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 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 500 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 London Mills water safe to drink? ▼
London Mills (PWS ID: IL0574620) has 94 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 500 people using Groundwater sources.
How many people does London Mills serve? ▼
London Mills serves 500 people in London Mills, Illinois. It is a Local-owned system using Groundwater water sources with 170 service connections.
What type of violations does London Mills have? ▼
London Mills has 94 total violations: 4 health-based violations (MCL exceedances or treatment failures), 57 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in London Mills water? ▼
No PFAS testing data is available for London Mills under the EPA's UCMR5 monitoring program.
What water source does London Mills use? ▼
London Mills 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.