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Non-Transient Non-Community Water System · PWS IL3005587

Armstrong Twp Hs

Armstrong, Illinois 61812 - drinking water served from groundwater sources to 162 people, tracked in EPA SDWIS and UCMR5.

162
People served
95
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 95 drinking-water violations at Armstrong Twp Hs, 2% of them health-based - above the Illinois per-system average.

95
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
162
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Armstrong Twp Hs

Armstrong Twp Hs is a public/private-owned non-transient non-community water system that delivers drinking water to 162 residents in Armstrong, Illinois (Vermilion County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 95 total violations for this system , of which 2 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 93 monitoring and reporting violations are on file. The most recent violation on record dates to 2006.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 3 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%).

Armstrong Twp Hs's 95 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
162
Total Violations
95
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Public/Private
Connections
1
County
Vermilion
School/Daycare
Yes
MCL Violations
2
Monitoring Violations
93
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 3 2006
Barium MR 2 1996
Cadmium MR 2 1996
CYANIDE MR 2 1996
Mercury MR 2 1996
BHC-GAMMA MR 2 1996
Carbofuran MR 2 1996
Atrazine MR 2 1996
Heptachlor MR 2 1996
Heptachlor epoxide MR 2 1996
2,4-D MR 2 1996
2,4,5-TP MR 2 1996
Pentachlorophenol MR 2 1996
1,2-DIBROMO-3-CHLOROPROPANE MR 2 1996
ETHYLENE DIBROMIDE MR 2 1996
Chlordane MR 2 1996
1,2,4-Trichlorobenzene MR 2 1996
Xylenes, Total MR 2 1996
DICHLOROMETHANE MR 2 1996
p-Dichlorobenzene MR 2 1996
Vinyl chloride MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
1,2-Dichloroethane MR 2 1996
Carbon tetrachloride MR 2 1996
1,1,2-Trichloroethane MR 2 1996
CHLOROBENZENE MR 2 1996
Benzene MR 2 1996
Toluene MR 2 1996
Ethylbenzene MR 2 1996
Coliform (TCR) MCL 2 2006

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 Armstrong Twp Hs.

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 IL3005587 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 Armstrong Twp Hs 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
2006 Coliform (TCR) MR 3 SDWIS / IL3005587 / 3100
2006 Coliform (TCR) MCL 2 SDWIS / IL3005587 / 3100
2005 Lead and Copper Rule MR 2 SDWIS / IL3005587 / 5000
1996 Barium MR 2 SDWIS / IL3005587 / 1010
1996 Cadmium MR 2 SDWIS / IL3005587 / 1015
1996 CYANIDE MR 2 SDWIS / IL3005587 / 1024
1996 Mercury MR 2 SDWIS / IL3005587 / 1035
1996 BHC-GAMMA MR 2 SDWIS / IL3005587 / 2010
1996 Carbofuran MR 2 SDWIS / IL3005587 / 2046
1996 Atrazine MR 2 SDWIS / IL3005587 / 2050
1996 Heptachlor MR 2 SDWIS / IL3005587 / 2065
1996 Heptachlor epoxide MR 2 SDWIS / IL3005587 / 2067
1996 2,4-D MR 2 SDWIS / IL3005587 / 2105
1996 2,4,5-TP MR 2 SDWIS / IL3005587 / 2110
1996 Pentachlorophenol MR 2 SDWIS / IL3005587 / 2326

How Armstrong Twp Hs Compares

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

Metric Armstrong Twp Hs Illinois avg Federal benchmark
Total violations 95 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 162 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 Armstrong Twp Hs water safe to drink? ▼
Armstrong Twp Hs (PWS ID: IL3005587) has 95 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 162 people using Groundwater sources.
How many people does Armstrong Twp Hs serve? ▼
Armstrong Twp Hs serves 162 people in Armstrong, Illinois. It is a Public/Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Armstrong Twp Hs have? ▼
Armstrong Twp Hs has 95 total violations: 2 health-based violations (MCL exceedances or treatment failures), 93 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Armstrong Twp Hs water? ▼
No PFAS testing data is available for Armstrong Twp Hs under the EPA's UCMR5 monitoring program.
What water source does Armstrong Twp Hs use? ▼
Armstrong Twp Hs uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.