Wilton Water Works, AL
Lead detected, under the action levels
Latest 90th-percentile lead: 2.8 ppb (monitoring period 2021-2023). 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.
Wilton Water Works at a glance
Wilton Water Works serves about 3,000 people through 1,000 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Shelby County, Alabama. EPA system ID: AL0001172; phone on file: 205-709-0990. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2020 (3.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Wilton Water Works is 5 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 2.8 ppb |
| 2020 | 3.8 ppb |
| 2017 | 5 ppb |
Against other Alabama systems
Of the 542 Alabama systems with a lead result, the median latest reading is 0 ppb; 1 are over 15 ppb right now and 11 have gone over at some point. Wilton Water Works's 2.8 ppb sits at the 90th percentile in Alabama and the 80th nationally (higher means more lead).
Other water systems in Shelby County
13 other systems share Shelby County; 1 of them has a higher latest lead result than Wilton Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Alabaster Water Department, City Of | 40,986 | 1.1 ppb |
| Shelby County Commission-Water Services | 40,101 | 0 (not detected) |
| Pelham, City Of | 38,703 | 0 (not detected) |
| Calera, The Wwb Of Te City Of | 26,982 | 0 (not detected) |
| Helena, The Ub Of The City Of | 21,300 | 1.1 ppb |
| Columbiana, The Ww Board Of The Town Of | 12,903 | 10 ppb |
| Montevallo Water Works & Sewer Board | 10,746 | 1.5 ppb |
| Bethel Water System, Inc. | 4,398 | 0 (not detected) |
| Sterrett-Vandiver Water System, Inc. | 3,252 | 1 ppb |
| Vincent, The Wwb Of The City Of | 2,733 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Montevallo, AL 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 Wilton Water Works 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. Size matters more than most people expect: small vs large water systems.