Caernarvon Twp 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.
Who runs the water here
Caernarvon Twp Auth serves about 4,245 people through 1,232 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Berks County, Pennsylvania. EPA system ID: PA3060052; phone on file: 610-286-1017. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 2 ppb from 2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Caernarvon Twp Auth is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 0 (not detected) |
How Caernarvon Twp Auth compares
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. Caernarvon Twp Auth's reported as 0 (not detected) sits at the 5th percentile in Pennsylvania and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Berks County
71 other systems share Berks County; 16 of them have a higher latest lead result than Caernarvon Twp Auth. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Reading Area Water Authority | 95,100 | 0 (not detected) |
| Paw Penn District | 28,508 | 3 ppb |
| Paw Glen Alsace Div | 24,951 | 1 ppb |
| Muhlenberg Twp Muni Auth | 22,400 | 1 ppb |
| Kutztown Borough Water | 14,200 | 3 ppb |
| Shillington Muni Auth | 13,300 | 0 (not detected) |
| Mt Penn Boro Muni Auth | 10,400 | 3.4 ppb |
| Wyomissing Boro Water System | 8,500 | 1 ppb |
| Boyertown Muni Auth | 8,000 | 3.7 ppb |
| Wernersville Muni Water Auth | 7,920 | 0 (not detected) |
What to do in your house
Look up your address in Caernarvon Twp 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 Caernarvon Twp 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.