Horsham Water&Sewer Authority, PA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Horsham Water&Sewer Authority serves about 26,000 people through 8,228 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Montgomery County, Pennsylvania. EPA system ID: PA1460033; phone on file: 215-672-8011. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Horsham Water&Sewer Authority's lead record
That is down 3.3 ppb from 3.3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Horsham Water&Sewer Authority is 4.04 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 3.3 ppb |
| 2021 | 3.8 ppb |
| 2020 | 4.04 ppb |
| 2019 | 3.29 ppb |
| 2016 | 2.7 ppb |
Against other Pennsylvania systems
Of the 516 Pennsylvania systems with a lead result, the median latest reading is 2 ppb; 143 are over 15 ppb right now and 156 have gone over at some point. Horsham Water&Sewer Authority's reported as 0 (not detected) sits at the 19th percentile in Pennsylvania and the 39th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
37 other systems share Montgomery County; 10 of them have a higher latest lead result than Horsham Water&Sewer Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aqua Pa Main System | 822,600 | 0 (not detected) |
| North Penn Water Authority | 91,941 | 0.5 ppb |
| Pa American Norristown | 88,885 | 2 ppb |
| North Wales Water Authority | 72,496 | 1.6 ppb |
| Pottstown Borough Water Auth | 36,000 | 0.9 ppb |
| Ambler Boro Water Dept | 20,000 | 2.3 ppb |
| Aqua Pa Hatboro | 12,901 | 0 (not detected) |
| Aqua Pa Superior Main System | 11,400 | 0 (not detected) |
| Collegeville Trappe Joint Pwd | 8,470 | 3 ppb |
| Pa American Audubon | 8,200 | 4 ppb |
Next steps for Horsham, PA
Look up your address in Horsham Water&Sewer Authority's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Horsham Water&Sewer Authority whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.