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Community Water System · PWS IL1815150

Alto Pass Water District

Alto Pass, Illinois 62905 - drinking water served from groundwater sources to 1,015 people, tracked in EPA SDWIS and UCMR5.

1,015
People served
250
EPA violations
224
Health-based
Untested
UCMR5 result

The verdict

EPA records 250 drinking-water violations at Alto Pass Water District, 90% of them health-based - above the Illinois per-system average.

250
Total EPA violations on record
90%
Health-based (MCL / treatment failure)
1,015
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Alto Pass Water District

Alto Pass Water District is a local-owned community water system that delivers drinking water to 1,015 residents in Alto Pass, Illinois (Union County) through 466 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 250 total violations for this system , of which 224 (90%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 22 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 158 violations (MCL, health-based). 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%).

Alto Pass Water District's 250 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
1,015
Total Violations
250
Health-Based Violations
224
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
466
County
Union
School/Daycare
No
MCL Violations
224
Monitoring Violations
22
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MCL 158 2012
TTHM MCL 60 2011
Coliform (TCR) MCL 6 2002
Coliform (TCR) MR 6 2004
Chlorine MR 4 2004
Lead and Copper Rule MR 4 2014
TTHM MR 4 2016
Public Notice Other 4 2007
Total Haloacetic Acids (HAA5) MR 4 2016

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 Alto Pass Water District.

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 IL1815150 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 Alto Pass Water District 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
2016 TTHM MR 4 SDWIS / IL1815150 / 2950
2016 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IL1815150 / 2456
2014 Lead and Copper Rule MR 4 SDWIS / IL1815150 / 5000
2012 Total Haloacetic Acids (HAA5) MCL 158 SDWIS / IL1815150 / 2456
2011 TTHM MCL 60 SDWIS / IL1815150 / 2950
2007 Public Notice Other 4 SDWIS / IL1815150 / 7500
2004 Coliform (TCR) MR 6 SDWIS / IL1815150 / 3100
2004 Chlorine MR 4 SDWIS / IL1815150 / 0999
2002 Coliform (TCR) MCL 6 SDWIS / IL1815150 / 3100

How Alto Pass Water District Compares

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

Metric Alto Pass Water District Illinois avg Federal benchmark
Total violations 250 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 224 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 1,015 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 Alto Pass Water District water safe to drink? ▼
Alto Pass Water District (PWS ID: IL1815150) has 250 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,015 people using Groundwater sources.
How many people does Alto Pass Water District serve? ▼
Alto Pass Water District serves 1,015 people in Alto Pass, Illinois. It is a Local-owned system using Groundwater water sources with 466 service connections.
What type of violations does Alto Pass Water District have? ▼
Alto Pass Water District has 250 total violations: 224 health-based violations (MCL exceedances or treatment failures), 22 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Alto Pass Water District water? ▼
No PFAS testing data is available for Alto Pass Water District under the EPA's UCMR5 monitoring program.
What water source does Alto Pass Water District use? ▼
Alto Pass Water District 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.