Theresa Waterworks

ZipCheckup's reading of EPA records for Theresa Waterworks (WI1140154): 1 health-based violation recorded since 2021. Theresa Waterworks's EPA record lists 1 historical violation, and none is listed as open in that record; the utility supplies water to 1,262 residents.

Data: EPA SDWIS

System Overview

Theresa Waterworks (EPA ID: WI1140154) is a community water system in Wisconsin that serves approximately 1,262 people from groundwater sources.

This system provides water to 4 ZIP codes across 4 communities.

Violation History

Status breakdown for accepted records with record years 2021-2026: 1 resolved, 0 archived, 0 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.

Recent Violations

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Health Risk Details

Chlorine (Residual Disinfectant) (EPA limit: 4 mg/L (MRDL — Maximum Residual Disinfectant Level))

Irritation & DBP formation at high levels At-risk groups: kidney dialysis patients (dialysis water must be dechlorinated).

Treatment options (verify a product is certified to reduce this contaminant): granular activated carbon (GAC), KDF media filter, carbon block filter. Find the right filter →

Lead & Copper

EPA Lead and Copper Rule evidence attributed directly to this water system:

No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WI or modeled from parcel and building-footprint data.

• 53006 - Brownsville
• 53048 - Lomira
• 53050 - Mayville
• 53091 - Theresa

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Theresa Waterworks (WI1140154) on EPA.gov.

Frequently Asked Questions

Is Theresa Waterworks water safe to drink?

The accepted 2026Q2 ECHO snapshot shows no current noncompliance for Theresa Waterworks; its 1 accepted 2021-2026 record are resolved or archived. Historical compliance status does not establish conditions at a specific tap.

How many people does Theresa Waterworks serve?

Theresa Waterworks serves approximately 1,262 people across 4 ZIP codes in Wisconsin.

Where does Theresa Waterworks get its water?

The primary water source is groundwater.

@misc{zipcheckup-water-system-wi1140154,
  author = {{ZipCheckup}},
  title  = {{Theresa Waterworks (WI): 1 Health Violation}},
  year   = {n.d.},
  url    = {https://zipcheckup.com/water-system/wi1140154/}
}