Hollister, OK
Lead detected, under the action levels
Latest 90th-percentile lead: 1.5 ppb (monitoring period 2021-2023). 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.
Hollister at a glance
Hollister serves about 60 people through 20 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 Tillman County, Oklahoma. EPA system ID: OK2007102; phone on file: 580-597-3097. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Hollister's lead record
Against the period ending 2023 (1.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hollister is 9.9 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.5 ppb |
| 2023 | 1.5 ppb |
| 2020 | 0 (not detected) |
| 2019 | 9.9 ppb |
How Hollister 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. Hollister's 1.5 ppb sits at the 64th percentile in Oklahoma and the 63rd nationally (higher means more lead).
Neighbouring systems
6 other systems share Tillman County; 4 of them have a higher latest lead result than Hollister. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Frederick | 3,940 | 1.8 ppb |
| Tillman Co Rwd #1 | 1,500 | 7.59 ppb |
| Grandfield | 1,110 | 0 (not detected) |
| Tipton | 916 | 4.46 ppb |
| Davidson | 375 | 6.44 ppb |
| Manitou | 278 | 0.86 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Hollister, 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 Hollister 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. The lead result guide covers how utilities pick the homes they sample. The action level is dropping - the 10 ppb rule from 2027.