- EPA's UCMR 5 testing looked for 30 contaminants here and found none.
Public EPA test results
Can you drink Monroe tap water? What EPA records show
EPA WA5355820 · serves Snohomish County, WA · about 23,467 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Monroe Water System (EPA WA5355820)
EPA data as of October 14, 2026. For Monroe's main utility, Monroe Water System: We found no health-based violations in EPA's records for this system (WA5355820) since July 1, 2021, as of October 14, 2026. PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Monroe Water System, as of October 14, 2026
We found no health-based violations in EPA's records for this system (WA5355820) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Monroe Water System (SDWIS). Data as of October 14, 2026.
This system buys water from Everett Public Works Dept. City of (WA5324050); see that system's records.
Source: Everett Public Works Dept. City of (WA5324050) report. Data as of October 14, 2026.
EPA's UCMR 5 testing looked for 30 contaminants here and found none.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Monroe Water System use chloramine?
We didn't find chloramine in Monroe Water System's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.