St. Louis Rwd, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 0.43 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.
St. Louis Rwd at a glance
St. Louis Rwd serves about 225 people through 89 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Pottawatomie County, Oklahoma. EPA system ID: OK2006304; phone on file: 405-289-1251. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for St. Louis Rwd is 3.4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.43 ppb |
| 2022 | 0 (not detected) |
| 2019 | 3.4 ppb |
| 2016 | 0 (not detected) |
How St. Louis Rwd compares
Of the 870 Oklahoma systems with a lead result, the median latest reading is 0.81 ppb; 6 are over 15 ppb right now and 66 have gone over at some point. St. Louis Rwd's 0.43 ppb sits at the 45th percentile in Oklahoma and the 42nd nationally (higher means more lead).
Nearby utilities
14 other systems share Pottawatomie County; 7 of them have a higher latest lead result than St. Louis Rwd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Shawnee Municipal Authority | 29,990 | 2.8 ppb |
| Tecumseh Utility Authority | 6,098 | 0 (not detected) |
| Tri-County Rwd #2 | 5,172 | 3.97 ppb |
| Mcloud | 2,939 | 7.4 ppb |
| Pottawatomie Co Development Auth | 1,200 | 0.7 ppb |
| Maud | 1,136 | 0 (not detected) |
| Pottawatomie County Rwd #3 | 560 | 1.53 ppb |
| Wanette Public Works Authority | 402 | 0 (not detected) |
| Asher Util Dev Auth | 375 | 0.61 ppb |
| Pottawatomie Co. Rwd #3 (Dale Plant) | 313 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; St. Louis, OK 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 St. Louis Rwd 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.