Lake Seven Falls Assn Inc, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 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. 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
Lake Seven Falls Assn Inc serves about 475 people through 76 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ste. Genevieve County, Missouri. EPA system ID: MO4256181. Ask the utility on your bill for your address in their service line inventory.
Lake Seven Falls Assn Inc's lead record
Against the period ending 2022 (0.63 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Lake Seven Falls Assn Inc is 1.81 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.4 ppb |
| 2022 | 0.63 ppb |
| 2022 | 0.63 ppb |
| 2019 | 1.81 ppb |
| 2019 | 1.81 ppb |
| 2016 | 1.8 ppb |
| 2016 | 1.8 ppb |
Against other Missouri systems
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. Lake Seven Falls Assn Inc's 1.4 ppb sits at the 58th percentile in Missouri and the 62nd nationally (higher means more lead).
Other water systems in Ste. Genevieve County
7 other systems share Ste. Genevieve County; 3 of them have a higher latest lead result than Lake Seven Falls Assn Inc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ste Genevieve Pws | 4,999 | 0 (not detected) |
| Ste Genevieve County Pwsd 1 Sc | 3,718 | 1.5 ppb |
| Ste Genevieve County Pwsd 1 North | 1,287 | 1.11 ppb |
| Lake Forest Estates | 811 | 1.35 ppb |
| Grayhawk Water | 750 | 1.41 ppb |
| Bloomsdale Pws | 639 | 1.18 ppb |
| St Mary Pws | 350 | 3.25 ppb |
Your move
Test your own tap with a certified lab first-draw sample; St Genevieve, 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 Lake Seven Falls Assn Inc 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.