What's in COTTONWOOD MUNICIPAL WATER CW1's water?
COTTONWOOD MUNICIPAL WATER CW1 has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 11,023 people through 4,409 service connections.
How this compares nationally
196 total violations and 37 health-based ones put COTTONWOOD MUNICIPAL WATER CW1 at the 97th percentile nationally for violation burden, rank 414 of 12,903.
How COTTONWOOD MUNICIPAL WATER CW1 compares within AZ
AZ's 199 covered systems average 8.2 health-based violations each; COTTONWOOD MUNICIPAL WATER CW1 carries 37, more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for COTTONWOOD MUNICIPAL WATER CW1 is from 2021-01-04 (health-based: 2021-01-04). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
COTTONWOOD MUNICIPAL WATER CW1'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)
- Other regulated metals - flagged from: Arsenic
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 COTTONWOOD MUNICIPAL WATER CW1'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 196 logged violations can see. The guide to what this data misses covers that gap.