Anna, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 1.7 ppb (monitoring period 2025-2025). 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
Anna serves about 4,910 people through 2,064 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 Union County, Illinois. EPA system ID: IL1810050; phone on file: 618-833-8528. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Anna's lead record
Against the period ending 2025 (1.4 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Anna is 4.4 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.7 ppb |
| 2025 | 1.4 ppb |
| 2025 | 1.6 ppb |
| 2024 | 1.3 ppb |
| 2024 | 0.9 ppb |
| 2023 | 2.5 ppb |
| 2020 | 1.68 ppb |
| 2017 | 4.4 ppb |
Where this result ranks
Of the 1,744 Illinois systems with a lead result, the median latest reading is 0 ppb; 22 are over 15 ppb right now and 152 have gone over at some point. Anna's 1.7 ppb sits at the 70th percentile in Illinois and the 66th nationally (higher means more lead).
Other water systems in Union County
8 other systems share Union County; 4 of them have a higher latest lead result than Anna. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lick Creek Pwd | 2,365 | 0 (not detected) |
| Jonesboro | 1,799 | 0 (not detected) |
| Cobden | 1,267 | 4.1 ppb |
| Alto Pass Water District | 1,015 | 3 ppb |
| Shawnee Valley Pwd | 738 | 1 ppb |
| Dongola | 736 | 2.65 ppb |
| Choate Mhc | 533 | 0 (not detected) |
| Anna-Jonesboro Water Commission | 28 | 2.64 ppb |
Next steps for Anna, IL
Test your own tap with a certified lab first-draw sample; Anna, 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 Anna 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. Size matters more than most people expect: small vs large water systems.