TOWN OF ZWOLLE WATER SYSTEM: EPA violation history, explained
TOWN OF ZWOLLE WATER SYSTEM had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. It serves 2,520 people through 840 service connections.
TOWN OF ZWOLLE WATER SYSTEM's record against the rest of the country
Out of 12,903 systems in this dataset, TOWN OF ZWOLLE WATER SYSTEM ranks 552th by violation burden (96th percentile) - 45 violations total, 31 health-baseds.
Against the LA average
Among the 347 LA systems in this dataset, the average is 12.6 health-based violations - TOWN OF ZWOLLE WATER SYSTEM's 31 is above that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
TOWN OF ZWOLLE WATER SYSTEM's most recent violation on record is dated 2025-12-02, with the most recent health-based one dated 2024-01-10. Last reported to EPA: 06/23/2026.
The concern categories on record
TOWN OF ZWOLLE WATER SYSTEM'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); Groundwater Rule; Revised Total Coliform Rule
- Disinfection byproducts - flagged from: TTHM
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 TOWN OF ZWOLLE WATER SYSTEM's record does not cover
TOWN OF ZWOLLE WATER SYSTEM's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. This record - 31 health-based violations on file for TOWN OF ZWOLLE WATER SYSTEM - 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.