Comanche Co Rwd #4, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 1.53 ppb (monitoring period 2025-2025). 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.
Comanche Co Rwd #4 at a glance
Comanche Co Rwd #4 serves about 3,000 people through 1,579 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Comanche County, Oklahoma. EPA system ID: OK3001654; phone on file: 580-429-8280. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is up 1.53 ppb from 0 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Comanche Co Rwd #4 is 2.27 ppb across 16 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.53 ppb |
| 2025 | 0 (not detected) |
| 2024 | 2.27 ppb |
| 2024 | 1.21 ppb |
| 2023 | 1.05 ppb |
| 2022 | 1.22 ppb |
| 2021 | 0.91 ppb |
| 2020 | 0.77 ppb |
| 2019 | 1.15 ppb |
| 2019 | 0.93 ppb |
| 2018 | 1.66 ppb |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 0 (not detected) |
| 2016 | 1.08 ppb |
Where this result ranks
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. Comanche Co Rwd #4's 1.53 ppb sits at the 65th percentile in Oklahoma and the 64th nationally (higher means more lead).
Nearby utilities
22 other systems share Comanche County; 8 of them have a higher latest lead result than Comanche Co Rwd #4. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lawton | 92,757 | 1.6 ppb |
| Fort Sill Hqusafacfs | 23,000 | 1.16 ppb |
| Elgin Pwa | 3,300 | 0 (not detected) |
| Comanche Co Rwd #1 | 2,800 | 0 (not detected) |
| Cache | 2,371 | 0 (not detected) |
| Comanche Co Rwd #3 | 2,325 | 3.33 ppb |
| Comanche Co Rwd #2 | 1,840 | 1.12 ppb |
| Geronimo | 1,200 | 0 (not detected) |
| Fletcher | 1,022 | 0 (not detected) |
| Pecan Valley Rwd | 1,000 | 4.06 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Cache, 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 Comanche Co Rwd #4 whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1720 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.