- EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
- PFOS (a PFAS): found in 2 of 10 samples, average 2.2 ppt, highest 17 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFPeA (a PFAS): found in 2 of 10 samples, average 2.2 ppt, highest 14.5 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFHxA (a PFAS): found in 2 of 10 samples, average 1.8 ppt, highest 11.6 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFBS (a PFAS): found in 2 of 10 samples, average 1.5 ppt, highest 8.9 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFOA (a PFAS): found in 2 of 10 samples, average 1.5 ppt, highest 10.1 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFHxS (a PFAS): found in 2 of 10 samples, average 1 ppt, highest 5.4 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFBA (a PFAS): found in 1 of 10 samples, average 0.70 ppt, highest 6.6 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- PFHpA (a PFAS): found in 1 of 10 samples, average 0.60 ppt, highest 5.8 ppt (EPA UCMR 5 testing, Mar 2023–Dec 2023)
- Lead, 90th percentile: 2.4 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink Richland tap water? What EPA records show
EPA WA5372250 · serves Benton County, WA · about 106,499 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
Richland City of (EPA WA5372250)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Richland's main utility, Richland City of: We found no health-based violations in EPA's records for this system (WA5372250) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
What EPA records show for Richland City of, as of October 14, 2026
We found no health-based violations in EPA's records for this system (WA5372250) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Richland City of (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 2.4 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2022–Dec 31, 2024). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
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 Richland City of use chloramine?
We didn't find chloramine in Richland City of's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.