Avista Utilities Noxon Rapids Dam, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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.
About Avista Utilities Noxon Rapids Dam
Avista Utilities Noxon Rapids Dam serves about 43 people through 13 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Sanders County, Montana. EPA system ID: MT0000300; phone on file: 406-847-6801. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Avista Utilities Noxon Rapids Dam's lead record
That is up 2 ppb from 0 ppb in the period ending 2018. The highest 90th-percentile result EPA holds for Avista Utilities Noxon Rapids Dam is 2 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2 ppb |
| 2018 | 0 (not detected) |
Against other Montana systems
Of the 753 Montana systems with a lead result, the median latest reading is 1 ppb; 5 are over 15 ppb right now and 28 have gone over at some point. Avista Utilities Noxon Rapids Dam's 2 ppb sits at the 64th percentile in Montana and the 69th nationally (higher means more lead).
Neighbouring systems
11 other systems share Sanders County; 1 of them has a higher latest lead result than Avista Utilities Noxon Rapids Dam. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Thompson Falls City Of | 1,950 | 0 (not detected) |
| Plains Town Of | 1,700 | 2 ppb |
| Hot Springs Municipal Water | 982 | 0 (not detected) |
| Water Service Inc Trout Creek | 350 | 0 (not detected) |
| Noxon Water District | 330 | 0 (not detected) |
| Salish Shores Trade Winds Comm Village | 215 | 0 (not detected) |
| Paradise Water District | 200 | 6 ppb |
| Woodside Park County Water And Sewer Dis | 115 | 0 (not detected) |
| Heron Community Water System | 84 | 0 (not detected) |
| Clear View Academy | 70 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Noxon, MT 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 Avista Utilities Noxon Rapids Dam 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. Systems that went over once often dip back under; here is what that means.