Dillsboro Water Works, IN
Lead detected, under the action levels
Latest 90th-percentile lead: 4.42 ppb (monitoring period 2023-2025). 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
Dillsboro Water Works serves about 2,000 people through 876 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 Dearborn County, Indiana. EPA system ID: IN5215002; phone on file: 812-432-9002. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
The highest 90th-percentile result EPA holds for Dillsboro Water Works is 4.42 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.42 ppb |
Against other Indiana systems
Of the 687 Indiana systems with a lead result, the median latest reading is 1.31 ppb; 6 are over 15 ppb right now and 36 have gone over at some point. Dillsboro Water Works's 4.42 ppb sits at the 87th percentile in Indiana and the 89th nationally (higher means more lead).
Other water systems in Dearborn County
8 other systems share Dearborn County; 0 of them have a higher latest lead result than Dillsboro Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tri-Township Water Corporation | 10,435 | 3.58 ppb |
| Aurora Utilities | 6,415 | 2.3 ppb |
| North Dearborn Water Authority | 5,775 | 2.13 ppb |
| Valley Rural Utility Company | 5,529 | 2.58 ppb |
| L-M-S Conservancy District | 5,375 | 1.77 ppb |
| City Of Greendale Utilities | 5,092 | 1.28 ppb |
| Lawrenceburg Municipal Utilities | 5,000 | 1.55 ppb |
| Hogan Water Corporation | 1,238 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Dillsboro, IN 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 Dillsboro 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.