Tyhee And S And N Estates Water Assn, ID
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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.
About Tyhee And S And N Estates Water Assn
Tyhee And S And N Estates Water Assn serves about 300 people through 68 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Bannock County, Idaho. EPA system ID: ID6030044; phone on file: 208-681-3423. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Tyhee And S And N Estates Water Assn is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 1 ppb |
| 2019 | 3 ppb |
| 2016 | 3 ppb |
Against other Idaho systems
Of the 763 Idaho systems with a lead result, the median latest reading is 1 ppb; 3 are over 15 ppb right now and 46 have gone over at some point. Tyhee And S And N Estates Water Assn's 2 ppb sits at the 68th percentile in Idaho and the 71st nationally (higher means more lead).
Other water systems in Bannock County
22 other systems share Bannock County; 7 of them have a higher latest lead result than Tyhee And S And N Estates Water Assn. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pocatello City Of | 58,231 | 5 ppb |
| Chubbuck City Of | 15,842 | 2 ppb |
| Mccammon City Of | 800 | 2 ppb |
| Inkom City Of | 792 | 1 ppb |
| Downey City Of | 586 | 2 ppb |
| Lava Hot Springs City Of | 386 | 2 ppb |
| Arimo City Of | 368 | 14 ppb |
| Laceys Vista Acres Water Corp | 200 | 9 ppb |
| Caribou Acres | 150 | 5 ppb |
| D And M Water Assn | 142 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Pocatello, ID 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 Tyhee And S And N Estates Water Assn 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.