- EPA's UCMR 5 testing looked for 30 contaminants here and found 3.
- PFBS (a PFAS): found in 4 of 4 samples, average 5.6 ppt, highest 7 ppt (EPA UCMR 5 testing, Feb 2023–Nov 2023)
- PFPeA (a PFAS): found in 4 of 4 samples, average 4.4 ppt, highest 5.5 ppt (EPA UCMR 5 testing, Feb 2023–Nov 2023)
- PFHxA (a PFAS): found in 3 of 4 samples, average 2.7 ppt, highest 3.8 ppt (EPA UCMR 5 testing, Feb 2023–Nov 2023)
- Lead: 9 in 10 homes tested came in at or below 1 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, 2023–Dec 31, 2025). 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, Surface Water Treatment Rule, Jul 2021–Sep 2022 (EPA SDWIS)
Public EPA test results
Siloam Springs, AR tap water: what EPA records show
EPA system ID AR0000056 · serves Benton County, AR · about 23,940 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
Siloam Springs Waterworks (EPA AR0000056)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Siloam Springs's main utility, Siloam Springs Waterworks: 1 health-standard violation since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Siloam Springs Waterworks, as of October 14, 2026
Health-standard violation: Surface Water Treatment Rules, Surface Water Treatment Rule, Jul 2021–Sep 2022 (EPA SDWIS).
Lead: 9 in 10 homes tested came in at or below 1 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, 2023–Dec 31, 2025). 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 3.
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 Siloam Springs Waterworks use chloramine?
We didn't find chloramine in Siloam Springs Waterworks's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)