Hyde Park S/D (Sc2450001), MO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Hyde Park S/D (Sc2450001) serves about 234 people through 85 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Greenwood County, Missouri. EPA system ID: SC2450001; phone on file: 314-380-8535. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2025 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hyde Park S/D (Sc2450001) is 6 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 0 (not detected) |
| 2022 | 3 ppb |
| 2019 | 6 ppb |
| 2016 | 1.1 ppb |
How Hyde Park S/D (Sc2450001) compares
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Hyde Park S/D (Sc2450001)'s reported as 0 (not detected) sits at the 16th percentile in Missouri and the 16th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Next steps for St Louis, MO
Look up your address in Hyde Park S/D (Sc2450001)'s service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Hyde Park S/D (Sc2450001) whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1460 ppb (copper action level 1,300 ppb).
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. Small systems behave differently: why small systems go over more often.