MARSHALL WATERWORKS: EPA violation history, explained
MARSHALL WATERWORKS has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 3,862, over 1,430 connections.
MARSHALL WATERWORKS's record against the rest of the country
Out of 12,903 systems in this dataset, MARSHALL WATERWORKS ranks 5,191th by violation burden (60th percentile) - 13 violations total, 3 health-baseds.
How MARSHALL WATERWORKS compares within WI
WI's 202 covered systems average 3.6 health-based violations each; MARSHALL WATERWORKS carries 3, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for MARSHALL WATERWORKS is from 2017-01-10 (health-based: 2017-01-10). Last reported to EPA: 05/29/2026.
What kind of problem, specifically
MARSHALL 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:
- Radionuclides - flagged from: Combined Radium (-226 and -228)
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What this data is and is not
Everything on this page is MARSHALL WATERWORKS's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 13 logged violations can see. The guide to what this data misses covers that gap.