Pa American Norristown, PA
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Pa American Norristown serves about 88,885 people through 32,857 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Montgomery County, Pennsylvania. EPA system ID: PA1460046; phone on file: 610-292-3591. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Pa American Norristown is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 1 ppb |
| 2019 | 0 (not detected) |
| 2016 | 2 ppb |
Where this result ranks
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. Pa American Norristown's 2 ppb sits at the 52nd percentile in Pennsylvania and the 73rd nationally (higher means more lead).
Neighbouring systems
37 other systems share Montgomery County; 5 of them have a higher latest lead result than Pa American Norristown. 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 |
| North Wales Water Authority | 72,496 | 1.6 ppb |
| Pottstown Borough Water Auth | 36,000 | 0.9 ppb |
| Horsham Water&Sewer Authority | 26,000 | 0 (not detected) |
| 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Norristown, PA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Pa American Norristown 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.