Ocwc Black Oak Mountain, MO
Lead detected, under the action levels
Latest 90th-percentile lead: 0.91 ppb (monitoring period 2024-2026). 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.
Ocwc Black Oak Mountain at a glance
Ocwc Black Oak Mountain serves about 477 people through 141 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Stone County, Missouri. EPA system ID: MO5036267; phone on file: 314-878-8454. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2023 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Ocwc Black Oak Mountain is 1.4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.91 ppb |
| 2023 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2019 | 1.4 ppb |
How Ocwc Black Oak Mountain 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. Ocwc Black Oak Mountain's 0.91 ppb sits at the 48th percentile in Missouri and the 49th nationally (higher means more lead).
Nearby utilities
87 other systems share Stone County; 45 of them have a higher latest lead result than Ocwc Black Oak Mountain. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Mo American Stonebridge Village | 2,100 | 0 (not detected) |
| Stone County Pwsd 1 | 2,052 | 2.13 ppb |
| Pwsd 2 Of Stone County 265 | 1,535 | 2.59 ppb |
| Crane Pws | 1,495 | 2.59 ppb |
| Mo Ark Water Co | 1,478 | 1.52 ppb |
| Reeds Spring Pws | 1,287 | 0 (not detected) |
| Mo American Ozark Mtn Water Company 2 | 583 | 7 ppb |
| Twin Island Estates | 525 | 4.58 ppb |
| Ocwc Lantern Bay | 502 | 3.54 ppb |
| Galena Pws | 500 | 1.01 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Creve Couer, 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 Ocwc Black Oak Mountain 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. Systems that went over once often dip back under; here is what that means.