Dewar, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 0.59 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
Dewar serves about 917 people through 362 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 Okmulgee County, Oklahoma. EPA system ID: OK3005613; phone on file: 918-652-4042. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Dewar's lead record
That is down 1.25 ppb from 1.84 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Dewar is 1.84 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.59 ppb |
| 2021 | 1.84 ppb |
| 2018 | 0.79 ppb |
| 2016 | 0 (not detected) |
How Dewar 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. Dewar's 0.59 ppb sits at the 47th percentile in Oklahoma and the 44th nationally (higher means more lead).
Other water systems in Okmulgee County
14 other systems share Okmulgee County; 8 of them have a higher latest lead result than Dewar. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Okmulgee Pwa | 13,495 | 3.1 ppb |
| Okmulgee Co. Rwd #6 (Hectorville) | 8,370 | 5 ppb |
| Henryetta Municipal Authority | 6,096 | 1.54 ppb |
| Okmulgee Co. Rwd #20 | 2,377 | 2.1 ppb |
| Okmulgee Co. Rwd #7 (Nuyaka) | 2,357 | 0 (not detected) |
| Okmulgee Co. Rwd #2 (Preston) | 2,355 | 0 (not detected) |
| Okmulgee Co. Rwd #4 | 1,913 | 0 (not detected) |
| Okmulgee Co. Rwd #1 | 1,890 | 0 (not detected) |
| Mcintosh Co. Rwd #13 (Wells) | 1,465 | 2.08 ppb |
| Morris | 1,460 | 1.8 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Dewar, 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 Dewar 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. Size matters more than most people expect: small vs large water systems.