Lafayette Water Works, IN
Lead detected, under the action levels
Latest 90th-percentile lead: 0.47 ppb (monitoring period 2026-2028). 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
Lafayette Water Works serves about 70,835 people through 27,667 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 groundwater, in Tippecanoe County, Indiana. EPA system ID: IN5279013; phone on file: 765-807-1700. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lafayette Water Works's lead record
That is down 3.33 ppb from 3.8 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Lafayette Water Works is 3.8 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2028 | 0.47 ppb |
| 2025 | 3.8 ppb |
| 2022 | 0 (not detected) |
| 2019 | 1.1 ppb |
| 2016 | 1.1 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. Lafayette Water Works's 0.47 ppb sits at the 36th percentile in Indiana and the 42nd nationally (higher means more lead).
Neighbouring systems
10 other systems share Tippecanoe County; 2 of them have a higher latest lead result than Lafayette Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Purdue Univ. Water Works | 50,000 | 0 (not detected) |
| Indiana American Water - West Lafayette | 35,533 | 0 (not detected) |
| Battle Ground Water District | 1,940 | 0 (not detected) |
| Dayton Water Utility | 1,420 | 0 (not detected) |
| Clarks Hill Water Works | 660 | 1.61 ppb |
| Wildcat Highlands | 360 | 0 (not detected) |
| Shadeland Mobile Home Park | 200 | 0 (not detected) |
| Modernaire Trailer Court | 105 | 0 (not detected) |
| Royal Oaks Estates Llc | 95 | 0 (not detected) |
| Kings Ridge Homeowners Association | 90 | 0.63 ppb |
Next steps for Lafayette, IN
Test your own tap with a certified lab first-draw sample; Lafayette, 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 Lafayette 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Systems that went over once often dip back under; here is what that means.