What's in ENID's water?
ENID 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: 49,347, over 19,739 connections.
ENID's record against the rest of the country
Out of 12,903 systems in this dataset, ENID ranks 2,676th by violation burden (79th percentile) - 30 violations total, 7 health-baseds.
How ENID compares within OK
Among the 240 OK systems in this dataset, the average is 39.5 health-based violations - ENID's 7 is at or below 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 ENID is from 2025-05-10 (health-based: 2025-05-10). Last reported to EPA: 05/13/2026.
What kind of problem, specifically
ENID'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)
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 ENID'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 ENID's customers' taps is household plumbing, invisible to a system-level record ranked 2,676th of 12,903 by violation count. The guide to what this data misses covers that gap.