Stone Creek Subdivision, MT
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2025-2025). 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 Stone Creek Subdivision
Stone Creek Subdivision serves about 378 people through 126 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Yellowstone County, Montana. EPA system ID: MT0005183; phone on file: 406-652-5523. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Stone Creek Subdivision's lead record
Against the period ending 2024 (5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Stone Creek Subdivision is 5 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4 ppb |
| 2024 | 5 ppb |
How Stone Creek Subdivision 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. Stone Creek Subdivision's 4 ppb sits at the 90th percentile in Montana and the 87th nationally (higher means more lead).
Neighbouring systems
45 other systems share Yellowstone County; 2 of them have a higher latest lead result than Stone Creek Subdivision. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Billings City Of | 114,000 | 3 ppb |
| Billings Heights Co Water Dist Of | 12,000 | 3 ppb |
| Laurel Municipal Water System | 6,339 | 2 ppb |
| Lockwood Water And Sewer District | 5,900 | 3 ppb |
| Pioneer Water Service | 900 | 0 (not detected) |
| Go 2 U Water Delivery | 875 | 0 (not detected) |
| Worden Ballantine Yellowstone | 800 | 3 ppb |
| Fisher Water Service | 750 | 0 (not detected) |
| Cherry Creek Estates Llc | 600 | 0 (not detected) |
| Windsor Estates | 530 | 1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Billings, 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 Stone Creek Subdivision 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.