Mountain Valley Water Co, UT
Lead detected, under the action levels
Latest 90th-percentile lead: 3.4 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.
Who runs the water here
Mountain Valley Water Co serves about 65 people through 10 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Salt Lake County, Utah. EPA system ID: UTAH18162; phone on file: 801-520-5131. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Mountain Valley Water Co's lead record
Against the period ending 2021 (2.6 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mountain Valley Water Co is 3.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3.4 ppb |
| 2021 | 2.6 ppb |
| 2018 | 2.9 ppb |
Where this result ranks
Of the 521 Utah systems with a lead result, the median latest reading is 1.71 ppb; 8 are over 15 ppb right now and 27 have gone over at some point. Mountain Valley Water Co's 3.4 ppb sits at the 77th percentile in Utah and the 84th nationally (higher means more lead).
Neighbouring systems
38 other systems share Salt Lake County; 11 of them have a higher latest lead result than Mountain Valley Water Co. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Salt Lake City Water System | 383,612 | 2.51 ppb |
| Granger-Hunter Improvement District | 121,083 | 1.9 ppb |
| West Jordan City Water System | 117,025 | 2.5 ppb |
| Sandy City Water System | 99,750 | 2.92 ppb |
| Jordan Valley Wcd | 99,335 | 5.05 ppb |
| South Jordan City | 89,704 | 4.1 ppb |
| Taylorsville-Bennion Id | 67,098 | 3.3 ppb |
| Herriman City Municipal Water Department | 60,000 | 3.8 ppb |
| University Of Utah | 57,080 | 5.5 ppb |
| Kearns Improvement District | 56,700 | 1.3 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Bluffdale, UT 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 Mountain Valley Water Co 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.