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Matteson, WI Tap Water Quality 2026

Water quality report for Matteson, WI — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Matteson's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Embarrass Waterworks PWSID: WI4690393 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 6.40 ppb, 43% of the action level and no violations are open. PFAS has never been sampled at this system.

B

Matteson earns a B for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 6.40 ppb — 43% of the federal action level
PFAS never sampled at this system
129 violations since 2015, 2 health-based
No violations currently open
Matteson's lead level vs. all Wisconsin community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 6.40 ppb — 43% of the federal action level
✓ Lower lead than 12% of Wisconsin utilities
Population Served
~128 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
129 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
43% of EPA action level
6.40 ppb
Action level: 15 ppb
The 90th-percentile lead result is 6.40 ppb, 43% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Nitrate MONITORING AND REPORTING — 10 mg/L 2023 Archived
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2023 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2023 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2023 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2023 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2023 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2023 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2023 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2023 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2023 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2023 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2023 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2023 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2023 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2023 Resolved
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2023 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023 Resolved
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2023 Resolved
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023 Resolved
LASSO MONITORING AND REPORTING — — 2023 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023 Resolved
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2023 Resolved
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023 Resolved
Glyphosate MONITORING AND REPORTING — 0.7 mg/L 2023 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2023 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2023 Resolved
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2023 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023 Resolved
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2023 Archived
Antimony, Total MONITORING AND REPORTING — 0.006 mg/L 2023 Archived
Beryllium, Total MONITORING AND REPORTING — 0.004 mg/L 2023 Archived
Thallium, Total MONITORING AND REPORTING — 0.002 mg/L 2023 Archived
Arsenic MONITORING AND REPORTING — 0.010 mg/L 2023 Archived
Barium MONITORING AND REPORTING — 2 mg/L 2023 Archived
Cadmium MONITORING AND REPORTING — 0.005 mg/L 2023 Archived
Chromium MONITORING AND REPORTING — 0.1 mg/L 2023 Archived
Fluoride MONITORING AND REPORTING — 4.0 mg/L 2023 Archived
Mercury MONITORING AND REPORTING — 0.002 mg/L 2023 Archived
Nickel MONITORING AND REPORTING — — 2023 Archived
Nitrite MONITORING AND REPORTING — 1 mg/L 2023 Archived
Endrin MONITORING AND REPORTING — 0.002 mg/L 2023 Resolved
Chlordane MONITORING AND REPORTING — 0.002 mg/L 2023 Resolved
Methoxychlor MONITORING AND REPORTING — 0.04 mg/L 2023 Resolved
Toxaphene MONITORING AND REPORTING — 0.003 mg/L 2023 Resolved
Dalapon MONITORING AND REPORTING — 0.2 mg/L 2023 Resolved
Diquat MONITORING AND REPORTING — 0.02 mg/L 2023 Resolved
Endothall MONITORING AND REPORTING — 0.1 mg/L 2023 Resolved
Glyphosate MONITORING AND REPORTING — 0.7 mg/L 2023 Resolved
OXAMYL MONITORING AND REPORTING — 0.2 mg/L 2023 Resolved
Simazine MONITORING AND REPORTING — 0.004 mg/L 2023 Resolved
Picloram MONITORING AND REPORTING — 0.5 mg/L 2023 Resolved
Dinoseb MONITORING AND REPORTING — 0.007 mg/L 2023 Resolved
Hexachlorocyclopentadiene MONITORING AND REPORTING — 0.05 mg/L 2023 Resolved
Carbofuran MONITORING AND REPORTING — 0.04 mg/L 2023 Resolved
Atrazine MONITORING AND REPORTING — 0.003 mg/L 2023 Resolved
LASSO MONITORING AND REPORTING — — 2023 Resolved
Heptachlor MONITORING AND REPORTING — 0.0004 mg/L 2023 Resolved
Heptachlor epoxide MONITORING AND REPORTING — 0.0002 mg/L 2023 Resolved
2,4-D MONITORING AND REPORTING — 0.07 mg/L 2023 Resolved
2,4,5-TP MONITORING AND REPORTING — 0.05 mg/L 2023 Resolved
HEXACHLOROBENZENE MONITORING AND REPORTING — 0.001 mg/L 2023 Resolved
Pentachlorophenol MONITORING AND REPORTING — 0.001 mg/L 2023 Resolved
BHC-GAMMA MONITORING AND REPORTING — 0.0002 mg/L 2023 Resolved
Stage 1 Disinfectants and Disinfection Byproducts Rule TREATMENT TECHNIQUE — — 2020 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2020 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2020 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2020 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2020 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2020 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2020 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2020 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2020 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2020 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2020 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2020 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2020 Resolved
DICHLOROMETHANE MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,2,4-Trichlorobenzene MONITORING AND REPORTING — 0.07 mg/L 2020 Resolved
cis-1,2-Dichloroethylene MONITORING AND REPORTING — 0.07 mg/L 2020 Resolved
Xylenes, Total MONITORING AND REPORTING — 10 mg/L 2020 Resolved
o-Dichlorobenzene MONITORING AND REPORTING — 0.6 mg/L 2020 Resolved
p-Dichlorobenzene MONITORING AND REPORTING — 0.075 mg/L 2020 Resolved
Vinyl chloride MONITORING AND REPORTING — 0.002 mg/L 2020 Resolved
trans-1,2-Dichloroethylene MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
1,2-Dichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Carbon tetrachloride MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,2-Dichloropropane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Trichloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
1,1,2-Trichloroethane MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Tetrachloroethylene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
CHLOROBENZENE MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
Benzene MONITORING AND REPORTING — 0.005 mg/L 2020 Resolved
Ethylbenzene MONITORING AND REPORTING — 0.7 mg/L 2020 Resolved
Styrene MONITORING AND REPORTING — 0.1 mg/L 2020 Resolved
1,1-Dichloroethylene MONITORING AND REPORTING — 0.007 mg/L 2020 Resolved
Toluene MONITORING AND REPORTING — 1 mg/L 2020 Resolved
1,1,1-Trichloroethane MONITORING AND REPORTING — 0.2 mg/L 2020 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2017–2019 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2017–2019 Resolved
Nitrate MCL EXCEEDANCE 10.62 MG/L 10 mg/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

129 violations are on record since 2015, of which 2 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Embarrass Waterworks
PWSID WI4690393
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served
Service connections 128
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Matteson tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 6.40 ppb, 43% of the action level.
Does Matteson water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Matteson? ▼
Embarrass Waterworks (PWSID WI4690393). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2023-03-22. No significant deficiencies were recorded.

What Should Matteson Residents Do?

1
Consider a filter certified for lead
Look for NSF/ANSI 53 certification for lead reduction.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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