Can you drink Riverton tap water? What EPA records show
EPA system ID WY5600047 · serves Riverton, WY · about 10,330 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Riverton, City of (EPA WY5600047)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Riverton's main utility, Riverton, City of: 1 health-standard violation since July 1, 2021 in EPA records (EPA SDWIS). EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
What EPA records show for Riverton, City of, as of October 14, 2026
Health-standard violation: Surface Water Treatment Rules, Long Term 2 Enhanced Surface Water Treatment Rule, Jun 2023–Aug 2023 (EPA SDWIS).
Lead: 9 in 10 homes tested came in at or below 3 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2024–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
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 Riverton, City of use chloramine?
We didn't find chloramine in Riverton, City of's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
Reported results in EPA records (data as of Oct 14–15, 2026)
EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
Lithium: found in 3 of 29 samples, average 1.03 µg/L, highest 11 µg/L (EPA UCMR 5 testing, May 2023–Nov 2023)
PFHxS (a PFAS): found in 1 of 29 samples, average 1.3 ppt, highest 37 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFHxA (a PFAS): found in 1 of 29 samples, average 1 ppt, highest 28 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFPeA (a PFAS): found in 1 of 29 samples, average 0.70 ppt, highest 19 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFBS (a PFAS): found in 1 of 29 samples, average 0.40 ppt, highest 13 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFPeS (a PFAS): found in 1 of 29 samples, average 0.40 ppt, highest 13 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFOS (a PFAS): found in 1 of 29 samples, average 0.20 ppt, highest 7 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFBA (a PFAS): found in 1 of 29 samples, average 0.20 ppt, highest 5 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
PFHpA (a PFAS): found in 1 of 29 samples, average 0.10 ppt, highest 3.6 ppt (EPA UCMR 5 testing, May 2023–Nov 2023)
Lead: 9 in 10 homes tested came in at or below 3 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2024–Dec 31, 2026). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
Health-standard violation: Surface Water Treatment Rules, Long Term 2 Enhanced Surface Water Treatment Rule, Jun 2023–Aug 2023 (EPA SDWIS)
Source: EPA SDWIS (ECHO SDWA bulk download), data as of Oct 14, 2026
Source: EPA UCMR 5 occurrence data, data as of Oct 15, 2026
These are EPA's public records for this water system, shown as of October 14, 2026. If you represent this utility, or think a record here is wrong, tell us: Report an error. If the error is in EPA's own records, your state drinking water program can correct it there, and this page updates at our next data refresh.
We don't give a safe or unsafe verdict. Here is what the public data shows: EPA records for Riverton's main utility, Riverton, City of, as of October 14, 2026. 1 health-standard violation since July 1, 2021 in EPA records (EPA SDWIS). EPA's UCMR 5 testing looked for 30 contaminants here and found 9. A guideline and a legal limit are different things, and this is public data, not a test of your tap.
Which utility supplies water in Riverton?
Riverton, City of is the main utility for Riverton in EPA's records (EPA WY5600047), serving about 10,330 people (EPA SDWIS). Your water bill names your utility.
Does Riverton tap water contain PFAS?
PFOS (a PFAS): found in 1 of 29 samples, average 0.20 ppt, highest 7 ppt (EPA UCMR 5 testing, May 2023–Nov 2023). This is public data, not a test of your tap.
How recent is this data?
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026. Data may be one to three years old and may not reflect the water at your tap. If you want your own tap tested, use a state-certified laboratory.
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