Southgate Subdivision, MO
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14.8 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Southgate Subdivision at a glance
Southgate Subdivision serves about 216 people through 69 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Pettis County, Missouri. EPA system ID: MO3036179. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is up 12.78 ppb from 2.02 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Southgate Subdivision is 14.8 ppb across 6 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 14.8 ppb over 10 |
| 2022 | 2.02 ppb |
| 2022 | 2.02 ppb |
| 2019 | 1.37 ppb |
| 2019 | 1.37 ppb |
| 2019 | 2.69 ppb |
Where this result ranks
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. Southgate Subdivision's 14.8 ppb sits at the 100th percentile in Missouri and the 99th nationally (higher means more lead).
Neighbouring systems
18 other systems share Pettis County; 0 of them have a higher latest lead result than Southgate Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sedalia Pws | 21,725 | 1.72 ppb |
| La Monte Pws | 1,120 | 5.51 ppb |
| Mo American Maplewood Subdivision | 1,008 | 2 ppb |
| Green Ridge Pws | 595 | 1.99 ppb |
| Mo American Smithton | 500 | 1 ppb |
| Houstonia Pws | 198 | 2.53 ppb |
| Hughesville Pws | 158 | 5.5 ppb |
| Mo American Monsees Lake Estates | 155 | 12 ppb |
| Elm Hills Utility Operating Company Inc | 154 | 0 (not detected) |
| Southern Hills Water Co | 144 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Sedalia, MO 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 Southgate Subdivision 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. This system is in the band the 2027 10 ppb rule changes.