Monticello Water Works, IN
Lead detected, under the action levels
Latest 90th-percentile lead: 1.99 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.
About Monticello Water Works
Monticello Water Works serves about 5,300 people through 2,520 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 White County, Indiana. EPA system ID: IN5291011; phone on file: 574-870-0062. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 5.36 ppb from 7.35 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Monticello Water Works is 13.2 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.99 ppb |
| 2022 | 7.35 ppb |
| 2019 | 5.8 ppb |
| 2016 | 13.2 ppb over 10 |
Where this result ranks
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. Monticello Water Works's 1.99 ppb sits at the 63rd percentile in Indiana and the 69th nationally (higher means more lead).
Other water systems in White County
9 other systems share White County; 4 of them have a higher latest lead result than Monticello Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Brookston Water Department | 1,815 | 0 (not detected) |
| Monon Water Utility | 1,700 | 2.29 ppb |
| Wolcott Water Works | 1,001 | 2.31 ppb |
| Chalmers Water Works | 550 | 1.89 ppb |
| Reynolds Water Works | 533 | 0 (not detected) |
| Royal Oaks Homeowners Assn., Inc. | 390 | 6.5 ppb |
| Lake Hill Park - Thayer Inc. | 104 | 0.99 ppb |
| Lazy Oaks | 48 | - |
| Scenic View Mobile Home Community | 25 | 4.11 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Monticello, 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 Monticello 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.