- EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
- Lithium: found in 2 of 26 samples, average 1.02 µg/L, highest 13.9 µg/L (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFPeA (a PFAS): found in 9 of 26 samples, average 4.5 ppt, highest 65.3 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFBA (a PFAS): found in 8 of 26 samples, average 4 ppt, highest 41.4 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFOS (a PFAS): found in 1 of 26 samples, average 1.3 ppt, highest 33.8 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFOA (a PFAS): found in 1 of 26 samples, average 0.70 ppt, highest 17.5 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFHxS (a PFAS): found in 1 of 26 samples, average 0.40 ppt, highest 10.6 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFHxA (a PFAS): found in 1 of 26 samples, average 0.30 ppt, highest 7.1 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFBS (a PFAS): found in 1 of 26 samples, average 0.20 ppt, highest 5.7 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- PFHpA (a PFAS): found in 1 of 26 samples, average 0.20 ppt, highest 4.4 ppt (EPA UCMR 5 testing, Feb 2024–Aug 2025)
- 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 Jun 1, 2025–Sep 30, 2025). 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 Horsham tap water? What EPA records show
EPA PA1460033 · serves Montgomery County, PA · about 26,000 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
Horsham Water&sewer Authority (EPA PA1460033)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Horsham's main utility, Horsham Water&sewer Authority: We found no health-based violations in EPA's records for this system (PA1460033) since July 1, 2021, as of October 14, 2026. EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
What EPA records show for Horsham Water&sewer Authority, as of October 14, 2026
We found no health-based violations in EPA's records for this system (PA1460033) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Horsham Water&sewer Authority (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 Jun 1, 2025–Sep 30, 2025). 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 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 Horsham Water&sewer Authority use chloramine?
We didn't find chloramine in Horsham Water&sewer Authority's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.