PlainWater
States → Wisconsin

Community Water System · PWS WI4360436

Two Rivers Waterworks

Two Rivers, Wisconsin 54241-0087 - drinking water served from surface water sources to 11,270 people, tracked in EPA SDWIS and UCMR5.

11,270
People served
298
EPA violations
16
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 298 drinking-water violations at Two Rivers Waterworks, 5% of them health-based - above the Wisconsin per-system average.

298
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
11,270
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Two Rivers Waterworks

Two Rivers Waterworks is a local-owned community water system that delivers drinking water to 11,270 residents in Two Rivers, Wisconsin (Manitowoc County) through 4,174 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 298 total violations for this system , of which 16 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 277 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 Lead and Copper Rule, recorded in 21 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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. Statewide, 78 of 202 UCMR5-tested systems have reported PFAS detections (38.6%).

Two Rivers Waterworks's 298 violations sit above the Wisconsin 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
11,270
Total Violations
298
Health-Based Violations
16
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
4,174
County
Manitowoc
School/Daycare
No
MCL Violations
0
Monitoring Violations
277
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 21 2018
Surface Water Treatment Rule TT 12 2014
Arsenic MR 4 2017
Barium MR 4 2017
Cadmium MR 4 2017
Chromium MR 4 2017
Fluoride MR 4 2017
Nitrite MR 4 2017
2,3,7,8-TCDD MR 4 2017
p-Dichlorobenzene MR 4 2017
trans-1,2-Dichloroethylene MR 4 2017
1,2-Dichloroethane MR 4 2017
1,1,1-Trichloroethane MR 4 2017
Carbon tetrachloride MR 4 2017
1,2-Dichloropropane MR 4 2017
Toluene MR 4 2017
Ethylbenzene MR 4 2017
Benzene MR 4 2017
DICHLOROMETHANE MR 4 2017
1,2,4-Trichlorobenzene MR 4 2017
HEXACHLOROBENZENE MR 4 2017
2,4,5-TP MR 4 2017
2,4-D MR 4 2017
Heptachlor epoxide MR 4 2017
LASSO MR 4 2017
Endrin MR 4 2017
Aldicarb sulfone MR 4 2017
Methoxychlor MR 4 2017
Carbofuran MR 4 2017
Picloram MR 4 2017

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
4:2 FTS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFMPA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFPeA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFMBA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
NFDHA 7/19/2023 <20.00 ppt 20.00 ppt Not Detected
PFBA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 7/19/2023 <8.00 ppt 8.00 ppt Not Detected
PFTrDA 7/19/2023 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 7/19/2023 <6.00 ppt 6.00 ppt Not Detected
PFEESA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFHpA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 7/19/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 7/19/2023 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
9Cl-PF3ONS 7/19/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 7/19/2023 <5.00 ppt 5.00 ppt Not Detected
PFBS 7/19/2023 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 4/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeS 4/26/2023 <4.00 ppt 4.00 ppt Not Detected
NEtFOSAA 4/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFPeA 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFTA 4/26/2023 <8.00 ppt 8.00 ppt Not Detected
PFBS 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFHxS 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFNA 4/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 4/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFOA 4/26/2023 <4.00 ppt 4.00 ppt Not Detected
PFDA 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpS 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 4/26/2023 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 4/26/2023 <2.00 ppt 2.00 ppt Not Detected
ADONA 4/26/2023 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/26/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/26/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 4/26/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/26/2023 <3.00 ppt 3.00 ppt 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 Two Rivers 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 WI4360436 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 Two Rivers 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
2024 Public Notice Other 3 SDWIS / WI4360436 / 7500
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / WI4360436 / 5200
2021 TTHM MR 4 SDWIS / WI4360436 / 2950
2021 Total Haloacetic Acids (HAA5) MR 4 SDWIS / WI4360436 / 2456
2018 Lead and Copper Rule MR 21 SDWIS / WI4360436 / 5000
2017 Arsenic MR 4 SDWIS / WI4360436 / 1005
2017 Barium MR 4 SDWIS / WI4360436 / 1010
2017 Cadmium MR 4 SDWIS / WI4360436 / 1015
2017 Chromium MR 4 SDWIS / WI4360436 / 1020
2017 Fluoride MR 4 SDWIS / WI4360436 / 1025
2017 Nitrite MR 4 SDWIS / WI4360436 / 1041
2017 2,3,7,8-TCDD MR 4 SDWIS / WI4360436 / 2063
2017 p-Dichlorobenzene MR 4 SDWIS / WI4360436 / 2969
2017 trans-1,2-Dichloroethylene MR 4 SDWIS / WI4360436 / 2979
2017 1,2-Dichloroethane MR 4 SDWIS / WI4360436 / 2980

How Two Rivers Waterworks Compares

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

Metric Two Rivers Waterworks Wisconsin avg Federal benchmark
Total violations 298 26 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 16 5.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 38.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 11,270 467 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 (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 Two Rivers Waterworks water safe to drink? ▼
Two Rivers Waterworks (PWS ID: WI4360436) has 298 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 11,270 people using Surface Water sources.
How many people does Two Rivers Waterworks serve? ▼
Two Rivers Waterworks serves 11,270 people in Two Rivers, Wisconsin. It is a Local-owned system using Surface Water water sources with 4,174 service connections.
What type of violations does Two Rivers Waterworks have? ▼
Two Rivers Waterworks has 298 total violations: 16 health-based violations (MCL exceedances or treatment failures), 277 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Two Rivers Waterworks water? ▼
No. Two Rivers Waterworks was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Two Rivers Waterworks use? ▼
Two Rivers Waterworks 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. 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.

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.