Aqua Pa West Chester, 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.
Aqua Pa West Chester at a glance
Aqua Pa West Chester serves about 48,600 people through 13,412 service connections, which makes it a large system under EPA's size classes. It is privately owned and draws surface water, in Chester County, Pennsylvania. EPA system ID: PA1150098; phone on file: 610-645-1122. They can tell you what your service line is made of and whether they pay to replace it.
Aqua Pa West Chester's lead record
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Aqua Pa West Chester is 5.6 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2024 | 3.34 ppb |
| 2022 | 3.85 ppb |
| 2019 | 5.6 ppb |
| 2016 | 0 (not detected) |
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. Aqua Pa West Chester's reported as 0 (not detected) sits at the 21st percentile in Pennsylvania and the 40th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Chester County
59 other systems share Chester County; 7 of them have a higher latest lead result than Aqua Pa West Chester. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pa American Royersford | 49,508 | 2 ppb |
| Pa American Coatesville | 36,960 | 2 ppb |
| Aqua Pa Uwchlan | 35,518 | 2.21 ppb |
| Phoenixville Water Dept | 16,599 | 1 ppb |
| Downingtown Water Authority | 9,900 | 2 ppb |
| Aqua Pa Friendship | 8,800 | 0 (not detected) |
| Aqua Pa Spring Run | 8,151 | 0 (not detected) |
| Kennett Square Mun Water Works | 6,328 | 0 (not detected) |
| Oxford Borough | 5,280 | 0 (not detected) |
| London Grove Twp Mun Auth | 4,770 | 0 (not detected) |
Next steps for Bryn Mawr, PA
Look up your address in Aqua Pa West Chester'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 Aqua Pa West Chester 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. A zero today does not rule out a jump later - the rules are tightening in 2027.