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Community Water System · PWS IL1170830

Royal Lakes

Royal Lakes, Illinois 62685 - drinking water served from surface water sources to 235 people, tracked in EPA SDWIS and UCMR5.

235
People served
111
EPA violations
12
Health-based
Untested
UCMR5 result

The verdict

EPA records 111 drinking-water violations at Royal Lakes, 11% of them health-based - above the Illinois per-system average.

111
Total EPA violations on record
11%
Health-based (MCL / treatment failure)
235
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Royal Lakes

Royal Lakes is a local-owned community water system that delivers drinking water to 235 residents in Royal Lakes, Illinois (Macoupin County) through 117 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 111 total violations for this system , of which 12 (11%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 51 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 21 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%).

Royal Lakes's 111 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
235
Total Violations
111
Health-Based Violations
12
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
117
County
Macoupin
School/Daycare
No
MCL Violations
7
Monitoring Violations
51
Treatment Tech Violations
5

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 21 2013
Consumer Confidence Rule Other 18 2013
Chlorine MR 12 2013
Public Notice Other 8 2004
Coliform (TCR) MCL 7 2003
Lead and Copper Rule MR 7 2004
Total Haloacetic Acids (HAA5) MR 7 2024
Lead and Copper Rule TT 5 1996
TTHM MR 4 2007

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 Royal Lakes.

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 IL1170830 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 Royal Lakes 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
2024 Total Haloacetic Acids (HAA5) MR 7 SDWIS / IL1170830 / 2456
2013 Coliform (TCR) MR 21 SDWIS / IL1170830 / 3100
2013 Consumer Confidence Rule Other 18 SDWIS / IL1170830 / 7000
2013 Chlorine MR 12 SDWIS / IL1170830 / 0999
2007 TTHM MR 4 SDWIS / IL1170830 / 2950
2004 Public Notice Other 8 SDWIS / IL1170830 / 7500
2004 Lead and Copper Rule MR 7 SDWIS / IL1170830 / 5000
2003 Coliform (TCR) MCL 7 SDWIS / IL1170830 / 3100
1996 Lead and Copper Rule TT 5 SDWIS / IL1170830 / 5000

How Royal Lakes Compares

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

Metric Royal Lakes Illinois avg Federal benchmark
Total violations 111 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 12 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 235 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 Royal Lakes water safe to drink? ▼
Royal Lakes (PWS ID: IL1170830) has 111 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 235 people using Surface Water sources.
How many people does Royal Lakes serve? ▼
Royal Lakes serves 235 people in Royal Lakes, Illinois. It is a Local-owned system using Surface Water water sources with 117 service connections.
What type of violations does Royal Lakes have? ▼
Royal Lakes has 111 total violations: 12 health-based violations (MCL exceedances or treatment failures), 51 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Royal Lakes water? ▼
No PFAS testing data is available for Royal Lakes under the EPA's UCMR5 monitoring program.
What water source does Royal Lakes use? ▼
Royal Lakes uses Surface Water 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.