- EPA's UCMR 5 testing looked for 30 contaminants here and found 8.
- Lithium: found in 12 of 12 samples, average 13.4 µg/L, highest 20.2 µg/L (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFOS (a PFAS): found in 6 of 12 samples, average 14.8 ppt, highest 40.9 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFBS (a PFAS): found in 6 of 12 samples, average 5.6 ppt, highest 20 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFHxS (a PFAS): found in 6 of 12 samples, average 3.7 ppt, highest 10.9 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFOA (a PFAS): found in 4 of 12 samples, average 2 ppt, highest 10 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFBA (a PFAS): found in 3 of 12 samples, average 1.4 ppt, highest 7 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFHxA (a PFAS): found in 1 of 12 samples, average 0.30 ppt, highest 4 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- PFPeA (a PFAS): found in 1 of 12 samples, average 0.30 ppt, highest 3 ppt (EPA UCMR 5 testing, Apr 2023–Apr 2024)
- Lead, 90th percentile: 0 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 Rio Rico tap water? What EPA records show
EPA AZ0412011 · serves Rio Rico, AZ · about 17,960 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
Liberty Water Rio Rico (EPA AZ0412011)
EPA data as of October 14, 2026. For Rio Rico's main utility, Liberty Water Rio Rico: We found no health-based violations in EPA's records for this system (AZ0412011) since July 1, 2021, as of October 14, 2026. This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for Liberty Water Rio Rico, as of October 14, 2026
We found no health-based violations in EPA's records for this system (AZ0412011) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Liberty Water Rio Rico (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0 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.
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
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 Liberty Water Rio Rico use chloramine?
We didn't find chloramine in Liberty Water Rio Rico's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.