Northampton Boro Muni Auth, 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.
About Northampton Boro Muni Auth
Northampton Boro Muni Auth serves about 40,000 people through 15,920 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 Northampton County, Pennsylvania. EPA system ID: PA3480057; phone on file: 610-262-6711. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Northampton Boro Muni Auth's lead record
That is down 3 ppb from 3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Northampton Boro Muni Auth is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 3 ppb |
| 2019 | 2 ppb |
| 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. Northampton Boro Muni Auth's reported as 0 (not detected) sits at the 21st 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
42 other systems share Northampton County; 4 of them have a higher latest lead result than Northampton Boro Muni Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Bethlehem | 117,259 | 0 (not detected) |
| Easton Area Water System | 96,867 | 0 (not detected) |
| Pawc Blue Mountain | 23,763 | 5 ppb |
| Pawc Bangor | 9,008 | 0 (not detected) |
| Hellertown Borough Authority | 5,800 | 2 ppb |
| Lower Saucon Authority | 5,700 | 0 (not detected) |
| Walnutport Authority | 3,000 | - |
| Bath Municipal Water Works | 2,680 | - |
| Pawc Westgate | 2,668 | - |
| Portland Boro Authority | 1,100 | - |
What to do in your house
Look up your address in Northampton Boro Muni Auth'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 Northampton Boro Muni Auth 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.