Retz Addn Improvement Association, IL
Lead detected, under the action levels
Latest 90th-percentile lead: 1.2 ppb (monitoring period 2022-2024). 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 Retz Addn Improvement Association
Retz Addn Improvement Association serves about 168 people through 67 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Lasalle County, Illinois. EPA system ID: IL0995400; phone on file: 815-228-5895. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 1.2 ppb from 0 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Retz Addn Improvement Association is 3.6 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.2 ppb |
| 2021 | 0 (not detected) |
| 2018 | 3.6 ppb |
How Retz Addn Improvement Association compares
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. Retz Addn Improvement Association's 1.2 ppb sits at the 62nd percentile in Illinois and the 58th nationally (higher means more lead).
Other water systems in Lasalle County
34 other systems share Lasalle County; 12 of them have a higher latest lead result than Retz Addn Improvement Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Il American-Streator | 19,000 | 1 ppb |
| Ottawa | 18,097 | 0 (not detected) |
| Peru | 9,896 | 10.5 ppb |
| La Salle | 9,700 | 0 (not detected) |
| Mendota | 7,100 | 7.06 ppb |
| Marseilles | 5,061 | 0 (not detected) |
| Il American-Lake Holiday | 4,750 | 2 ppb |
| Oglesby | 4,500 | 0 (not detected) |
| Seneca | 2,353 | 0 (not detected) |
| Sheridan Correctional Center | 1,670 | 3.6 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Ottawa, 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 Retz Addn Improvement Association 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.