Thomson Maximum Security Center, IL
No lead results on file with EPA
Latest 90th-percentile lead: no result on file. The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. EPA's database has no Lead and Copper Rule results for this system. Without them there is nothing to go on, so a tap test is the only way to know.
About Thomson Maximum Security Center
Thomson Maximum Security Center serves about 2,166 people through 15 service connections, which makes it a small system under EPA's size classes. It is federally owned and draws groundwater, in Carroll County, Illinois. EPA system ID: IL0150030; phone on file: 815-259-1001. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Nearby utilities
9 other systems share Carroll County. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Savanna | 3,020 | 0 (not detected) |
| Lanark | 1,504 | 5.1 ppb |
| Mount Carroll | 1,479 | 1.1 ppb |
| Milledgeville | 989 | 5.45 ppb |
| Shannon | 801 | 0 (not detected) |
| Thomson | 600 | 0.59 ppb |
| Chadwick | 523 | 5.33 ppb |
| Mountain Vale Village Mhp | 388 | - |
| Carroll Heights Utilities Company | 80 | 3 ppb |
Next steps for Thomson, IL
Test your own tap with a certified lab first-draw sample; Thomson, IL 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 Thomson Maximum Security Center 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.