What's in JOHNSON CREEK WATERWORKS's water?
JOHNSON CREEK WATERWORKS had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. Population served: 3,318, over 1,228 connections.
How this compares nationally
41 total violations and 7 health-based ones put JOHNSON CREEK WATERWORKS at the 80th percentile nationally for violation burden, rank 2,633 of 12,903.
How JOHNSON CREEK WATERWORKS compares within WI
Among the 202 WI systems in this dataset, the average is 3.6 health-based violations - JOHNSON CREEK WATERWORKS's 7 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for JOHNSON CREEK WATERWORKS is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
JOHNSON CREEK WATERWORKS's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: LEAD AND COPPER RULE REVISIONS
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
- Radionuclides - flagged from: Combined Radium (-226 and -228); Gross Alpha, Excl. Radon and U
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is JOHNSON CREEK WATERWORKS's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 7 health-based violations on file for JOHNSON CREEK WATERWORKS - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.