Maple Lake: EPA violation history, explained
Maple Lake has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 2,215, over 821 connections.
Ranked against every other system in this dataset
5 total violations and 1 health-based ones put Maple Lake at the 32th percentile nationally for violation burden, rank 8,779 of 12,903.
How Maple Lake compares within MN
Among the 254 MN systems in this dataset, the average is 0.8 health-based violations - Maple Lake's 1 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 Maple Lake is from 2005-01-09 (health-based: 1994-01-08). Last reported to EPA: 05/28/2026.
What kind of problem, specifically
Maple Lake'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:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
Everything on this page is Maple Lake'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 5 logged violations can see. The guide to what this data misses covers that gap.