Public Water System

KNOLLCREST

PWSID WI2681104 · Wisconsin · 66 people served

Poor

KNOLLCREST is an EPA-regulated public water system in Wisconsin (PWSID WI2681104). It serves an estimated 66 residents — a rural community of customers — across 1 community across 1 ZIP code.

Over the past five years, KNOLLCREST has recorded 7 EPA health-based violations. The grade of D summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

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Centered on the averaged ZIP-code centroid of 1 ZIP served.

Population

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for KNOLLCREST over the past five years of EPA SDWIS reporting.

Atrazinechemical

EPA Code 2039 · Maximum Contaminant Level Exceedance

violations

EPA Limit

0.003 mg/L

Last Reading

10.95 UG/L

First Reported

Aug 2021

Most Recent

Aug 2021

What this violation means

Atrazine is one of the most widely used herbicides in US agriculture, primarily on corn and sorghum. Spring runoff from farm fields creates seasonal spikes in atrazine levels in surface water sources across the Midwest. Long-term exposure is linked to hormone disruption and reproductive effects.

Recommended precautions

→Granular activated carbon removes atrazine — most carbon filters work.
→Reverse osmosis provides additional protection.
→Atrazine spikes are seasonal — utilities monitor quarterly averages, but acute exposure can occur in spring.

Read the complete guide to Atrazine

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by KNOLLCREST

MIDDLETON

ZIP Codes Served

53562

About this system

EPA records this system as PWSID WI2681104. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact KNOLLCREST directly or review their annual Consumer Confidence Report (CCR).