HORSHAM WATER&SEWER AUTHORITY
PA · PWS ID PA1460033 · Community water system
80
contaminants tested
35
detected
26,000
people served
PFAS detected
“Forever chemicals” from UCMR-5 — the only fresh nationwide measurements (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFPeA | 0.0653 ug/L | 9/26 | 2025 |
| PFBA | 0.0414 ug/L | 8/26 | 2025 |
| PFBS | 0.0057 ug/L | 1/26 | 2025 |
| PFHpA | 0.0044 ug/L | 1/26 | 2025 |
| PFHxA | 0.0071 ug/L | 1/26 | 2025 |
| PFHxS | 0.0106 ug/L | 1/26 | 2025 |
| PFOA | 0.0175 ug/L | 1/26 | 2025 |
| PFOS | 0.0338 ug/L | 1/26 | 2025 |
Other contaminants detected
| Contaminant | Max | Detection rate | Source | Period |
|---|---|---|---|---|
| Nitrate | 4000 UG/L | 158/190 | SYR4 | 2012–2019 |
| COPPER, FREE | 1000 UG/L | 127/130 | SYR4 | 2013–2019 |
| TTHM | 92.8 UG/L | 104/107 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 38 UG/L | 91/107 | SYR4 | 2012–2019 |
| Chloroform | 61.6 UG/L | 80/84 | SYR4 | 2017–2019 |
| Bromodichloromethane | 21.3 UG/L | 47/48 | SYR4 | 2017–2019 |
| Dibromochloromethane | 9.5 UG/L | 46/48 | SYR4 | 2017–2019 |
| Dichloroacetic Acid | 21.6 UG/L | 41/48 | SYR4 | 2017–2019 |
| Trichloroacetic Acid | 15 UG/L | 41/48 | SYR4 | 2017–2019 |
| Arsenic | 6.4 UG/L | 37/60 | SYR4 | 2012–2019 |
| Barium | 1128 UG/L | 34/34 | SYR4 | 2012–2019 |
| Chromium | 8.4 UG/L | 33/34 | SYR4 | 2012–2019 |
| Dibromoacetic acid | 2 UG/L | 27/48 | SYR4 | 2017–2019 |
| Lead | 15 UG/L | 25/129 | SYR4 | 2013–2019 |
| Bromoform | 2 UG/L | 22/48 | SYR4 | 2017–2019 |
| LEAD SUMMARY | 0.0070 mg/L | 16/16 | LCR | 2025 |
| Selenium | 1.6 UG/L | 13/34 | SYR4 | 2012–2019 |
| Tetrachloroethylene | 5 UG/L | 11/155 | SYR4 | 2012–2019 |
| Combined Uranium | 8.08623 UG/L | 9/9 | SYR4 | 2014–2017 |
| Monochloroacetic acid | 3 UG/L | 7/48 | SYR4 | 2017–2019 |
| 1,1-Dichloroethylene | 2.3 UG/L | 2/155 | SYR4 | 2012–2019 |
| lithium | 13.9 ug/L | 2/26 | UCMR-5 | 2025 |
| 1,1,1-Trichloroethane | 0.6000 UG/L | 1/155 | SYR4 | 2012–2019 |
| Fluoride | 100 UG/L | 1/35 | SYR4 | 2012–2019 |
| Monobromoacetic acid | 1 UG/L | 1/48 | SYR4 | 2017–2019 |
| Toluene | 2 UG/L | 1/155 | SYR4 | 2012–2019 |
| Trichloroethylene | 0.5000 UG/L | 1/155 | SYR4 | 2012–2019 |
45 contaminants tested, none detected
1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS4:2 FTS6:2 FTS8:2 FTS9Cl-PF3ONSADONAAntimony, TotalBenzeneBeryllium, TotalCHLOROBENZENECYANIDECadmiumCarbon tetrachlorideDICHLOROMETHANEEthylbenzeneGross Beta Particle ActivityHFPO-DAMercuryNEtFOSAANFDHANMeFOSAANitritePFDAPFDoAPFEESAPFHpSPFMBAPFMPAPFNAPFPeSPFTAPFTrDAPFUnAStyreneThallium, TotalVinyl chlorideXylenes, Totalcis-1,2-Dichloroethyleneo-Dichlorobenzenep-Dichlorobenzenetrans-1,2-Dichloroethylene