Brook Drive Water Assn, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (monitoring period 2024-2026). 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 Brook Drive Water Assn
Brook Drive Water Assn serves about 32 people through 14 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Flathead County, Montana. EPA system ID: MT0000099; phone on file: 406-261-2338. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 2 ppb from 3 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Brook Drive Water Assn is 3 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2019 | 3 ppb |
| 2017 | 2 ppb |
How Brook Drive Water Assn compares
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. Brook Drive Water Assn's 1 ppb sits at the 42nd percentile in Montana and the 50th nationally (higher means more lead).
Neighbouring systems
135 other systems share Flathead County; 53 of them have a higher latest lead result than Brook Drive Water Assn. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Kalispell Public Works | 25,000 | 2 ppb |
| Whitefish City Of | 10,418 | 2 ppb |
| Flathead County Water And Sewer | 9,520 | 1 ppb |
| Bigfork County Water And Sewer | 6,100 | 2 ppb |
| Columbia Falls City Of | 4,450 | 4 ppb |
| Big Mountain Water Company | 2,435 | 7 ppb |
| Lakeside Water System | 1,225 | 3 ppb |
| Hungry Horse Co Water And Sewer District | 1,135 | 0 (not detected) |
| Meadow Lake Co Water And Sewer District | 950 | 0 (not detected) |
| Somers Co Water And Sewer Dist | 765 | 2 ppb |
Next steps for Kalispell, MT
Test your own tap with a certified lab first-draw sample; Kalispell, 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 Brook Drive 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.