- EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
- PFPeA (a PFAS): found in 4 of 8 samples, average 2.5 ppt, highest 6.7 ppt (EPA UCMR 5 testing, Mar 2023–Jun 2024)
- PFHxA (a PFAS): found in 4 of 8 samples, average 2.1 ppt, highest 4.8 ppt (EPA UCMR 5 testing, Mar 2023–Jun 2024)
Public EPA test results
What EPA records show for Washington Suburban Sanitary Commission
EPA MD0150005 · serves Montgomery County, MD · about 1,900,000 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
Washington Suburban Sanitary Commission (EPA MD0150005)
What EPA records show for Washington Suburban Sanitary Commission, as of October 14, 2026
We found no health-based violations in EPA's records for this system (MD0150005) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Washington Suburban Sanitary Commission (SDWIS). Data as of October 14, 2026.
We found no lead 90th-percentile result in EPA's records for this system (MD0150005) for a monitoring period that ran on or after July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Washington Suburban Sanitary Commission (SDWIS). Data as of October 14, 2026.
EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
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 Washington Suburban Sanitary Commission use chloramine?
We didn't find chloramine in Washington Suburban Sanitary Commission's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.