What's in LONGMONT CITY OF's water?
LONGMONT CITY OF has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 104,178 people through 30,296 service connections.
LONGMONT CITY OF's record against the rest of the country
LONGMONT CITY OF has 42 violations on record in total, 1 of them health-based - ranking it 7,499th of 12,903 systems by violation count, the 42th percentile nationally.
How LONGMONT CITY OF compares within CO
Among the 230 CO systems in this dataset, the average is 3.0 health-based violations - LONGMONT CITY OF's 1 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for LONGMONT CITY OF is from 2022-01-07 (health-based: 1995-01-06). Last reported to EPA: 06/17/2026.
What kind of problem, specifically
LONGMONT CITY OF'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: Surface Water Treatment Rule
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
LONGMONT CITY OF'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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 42 logged violations can see. The guide to what this data misses covers that gap.