What's in BLACKWELL MUNICIPAL AUTHORITY's water?
BLACKWELL MUNICIPAL AUTHORITY 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: 7,668, over 3,136 connections.
BLACKWELL MUNICIPAL AUTHORITY's record against the rest of the country
74 total violations and 46 health-based ones put BLACKWELL MUNICIPAL AUTHORITY at the 98th percentile nationally for violation burden, rank 312 of 12,903.
How BLACKWELL MUNICIPAL AUTHORITY compares within OK
BLACKWELL MUNICIPAL AUTHORITY's 46 health-based violations sit above the OK average of 39.5, across 240 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for BLACKWELL MUNICIPAL AUTHORITY is from 2025-01-07 (health-based: 2025-01-07). Last reported to EPA: 05/13/2026.
What kind of problem, specifically
BLACKWELL MUNICIPAL AUTHORITY'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); Interim Enhanced Surface Water Treatment Rule; Surface Water Treatment 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 this data is and is not
Everything on this page is BLACKWELL MUNICIPAL AUTHORITY's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and BLACKWELL MUNICIPAL AUTHORITY's customers' taps is household plumbing, invisible to a system-level record ranked 312th of 12,903 by violation count. The guide to what this data misses covers that gap.