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HARTFORD WATERWORKS

PWS ID: WI2670110 · HARTFORD, Wisconsin 53027-1521

HARTFORD WATERWORKS serves 15,805 people in HARTFORD, Wisconsin using Groundwater water sources. It has 258 recorded EPA violations, including 7 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (4 compounds found).

Water Quality Snapshot: HARTFORD WATERWORKS

HARTFORD WATERWORKS is a local-owned community water system that delivers drinking water to 15,805 residents in HARTFORD, Wisconsin (Washington County) through 5,853 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 258 total violations for this system , of which 7 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 247 monitoring and reporting violations are on file. The most recent violation on record dates to 2005.

The most frequently cited contaminant at this system is Nitrate, recorded in 19 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 4 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 0.0068 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Wisconsin, EPA tracks 10,988 public water systems serving 5,131,439 people, with 285,161 cumulative violations and 58,688 health-based violations on record. About 72% of systems in the state carry at least one violation, and state-wide the average per system is 26 violations. HARTFORD WATERWORKS's 258 violations sit above the Wisconsin average. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

4 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
15,805
Total Violations
258
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
5,853
County
Washington
School/Daycare
No
MCL Violations
7
Monitoring Violations
247
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 19 1997
Gross Alpha, Excl. Radon and U MR 10 2002
1,1,1-Trichloroethane MR 10 1995
Benzene MR 10 1995
trans-1,2-Dichloroethylene MR 10 1995
Carbon tetrachloride MR 10 1995
1,2-Dichloropropane MR 10 1995
CHLOROBENZENE MR 10 1995
Styrene MR 10 1995
1,2,4-Trichlorobenzene MR 10 1995
cis-1,2-Dichloroethylene MR 10 1995
o-Dichlorobenzene MR 10 1995
p-Dichlorobenzene MR 10 1995
Vinyl chloride MR 10 1995
Ethylbenzene MR 10 1995
1,1,2-Trichloroethane MR 10 1995
Trichloroethylene MR 10 1995
1,2-Dichloroethane MR 10 1995
Xylenes, Total MR 10 1995
1,1-Dichloroethylene MR 10 1995
DICHLOROMETHANE MR 10 1995
Toluene MR 10 1995
Tetrachloroethylene MR 10 1995
Coliform (TCR) MR 8 2000
Nitrate MCL 6 2005
Consumer Confidence Rule Other 4 2002
Vinyl chloride MCL 1 1988

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
4:2 FTS 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/26/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/26/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/26/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 8/26/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/26/2024 <9 µg/L 9 µg/L Not Detected
8:2 FTS 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/26/2024 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/26/2024 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 8/26/2024 <0.006 µg/L 0.006 µg/L Not Detected
6:2 FTS 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/26/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/26/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFUnA 8/26/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/26/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/26/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 8/26/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/20/2024 0.0039 µg/L 0.003 µg/L Detected
PFNA 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 8/20/2024 0.0032 µg/L 0.003 µg/L Detected
HFPO-DA 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/20/2024 0.0062 µg/L 0.004 µg/L Detected
6:2 FTS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected

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 HARTFORD WATERWORKS.

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 WI2670110 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Wisconsin Drinking Water Authority

Wisconsin DNR — Drinking Water and Groundwater is the primacy agency that licenses and inspects HARTFORD WATERWORKS under EPA-delegated authority.

Open WI regulator portal

Source: Wisconsin DNR — Drinking Water and Groundwater

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
2005 Nitrate MCL 6 SDWIS / WI2670110 / 1040
2002 Gross Alpha, Excl. Radon and U MR 10 SDWIS / WI2670110 / 4000
2002 Consumer Confidence Rule Other 4 SDWIS / WI2670110 / 7000
2000 Coliform (TCR) MR 8 SDWIS / WI2670110 / 3100
1997 Nitrate MR 19 SDWIS / WI2670110 / 1040
1995 1,1,1-Trichloroethane MR 10 SDWIS / WI2670110 / 2981
1995 Benzene MR 10 SDWIS / WI2670110 / 2990
1995 trans-1,2-Dichloroethylene MR 10 SDWIS / WI2670110 / 2979
1995 Carbon tetrachloride MR 10 SDWIS / WI2670110 / 2982
1995 1,2-Dichloropropane MR 10 SDWIS / WI2670110 / 2983
1995 CHLOROBENZENE MR 10 SDWIS / WI2670110 / 2989
1995 Styrene MR 10 SDWIS / WI2670110 / 2996
1995 1,2,4-Trichlorobenzene MR 10 SDWIS / WI2670110 / 2378
1995 cis-1,2-Dichloroethylene MR 10 SDWIS / WI2670110 / 2380
1995 o-Dichlorobenzene MR 10 SDWIS / WI2670110 / 2968

How HARTFORD WATERWORKS Compares

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

Metric HARTFORD WATERWORKS Wisconsin avg Federal benchmark
Total violations 258 26 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 4 compounds 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 15,805 467 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 10,988 regulated public water systems in Wisconsin.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is HARTFORD WATERWORKS water safe to drink? ▼
HARTFORD WATERWORKS (PWS ID: WI2670110) has 258 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 4 PFAS compounds found. This system serves 15,805 people using Groundwater sources.
How many people does HARTFORD WATERWORKS serve? ▼
HARTFORD WATERWORKS serves 15,805 people in HARTFORD, Wisconsin. It is a Local-owned system using Groundwater water sources with 5,853 service connections.
What type of violations does HARTFORD WATERWORKS have? ▼
HARTFORD WATERWORKS has 258 total violations: 7 health-based violations (MCL exceedances or treatment failures), 247 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HARTFORD WATERWORKS water? ▼
Yes. UCMR5 testing detected 4 PFAS compounds in HARTFORD WATERWORKS's water supply: PFHxS, PFBS, PFOA, PFOS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does HARTFORD WATERWORKS use? ▼
HARTFORD WATERWORKS 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial