Johnston Co Rwd #3, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 1.35 ppb (monitoring period 2022-2024). 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
Johnston Co Rwd #3 serves about 2,783 people through 1,298 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 groundwater, in Johnston County, Oklahoma. EPA system ID: OK2003511; phone on file: 580-371-2141. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Johnston Co Rwd #3's lead record
That is up 1.35 ppb from 0 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Johnston Co Rwd #3 is 1.35 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 1.35 ppb |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
Against other Oklahoma systems
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. Johnston Co Rwd #3's 1.35 ppb sits at the 62nd percentile in Oklahoma and the 61st nationally (higher means more lead).
Nearby utilities
9 other systems share Johnston County; 5 of them have a higher latest lead result than Johnston Co Rwd #3. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tishomingo Municipal Authority | 3,000 | 0 (not detected) |
| Murray State College | 1,150 | 0 (not detected) |
| Johnston Co Rws& Swmd #4 | 600 | 1.78 ppb |
| Mannsville Public Works Authority | 587 | 5.88 ppb |
| Ravia | 459 | 2.37 ppb |
| Wapanucka | 420 | 1.64 ppb |
| Milburn Public Works Authority | 317 | 2.29 ppb |
| Mill Creek | 310 | 0 (not detected) |
| Bromide | 163 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Tishomingo, 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 Johnston Co Rwd #3 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.