Grantsville City, UT
Lead detected, under the action levels
Latest 90th-percentile lead: 2.9 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 Grantsville City
Grantsville City serves about 16,284 people through 4,800 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Tooele County, Utah. EPA system ID: UTAH23002; phone on file: 435-884-0627. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
Against the period ending 2025 (2.1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Grantsville City is 2.9 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2.9 ppb |
| 2025 | 2.1 ppb |
| 2020 | 1.8 ppb |
| 2019 | 2.7 ppb |
| 2019 | 1.7 ppb |
| 2018 | 1.7 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. Grantsville City's 2.9 ppb sits at the 72nd percentile in Utah and the 80th nationally (higher means more lead).
Other water systems in Tooele County
12 other systems share Tooele County; 3 of them have a higher latest lead result than Grantsville City. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tooele City Water System | 41,770 | 2.6 ppb |
| Stansbury Park Improvement District | 9,839 | 2.6 ppb |
| Oquirrh Mountain Water Co | 2,500 | 8.7 ppb |
| Wendover City Water System | 1,525 | 0.8 ppb |
| Erda Acres Water Co | 1,150 | 1.4 ppb |
| South Rim Water System | 834 | 1.1 ppb |
| Lincoln Culinary Water Assn | 660 | 1.3 ppb |
| Stockton Town Water System | 620 | 1.5 ppb |
| Dugway - English Village | 600 | 2.1 ppb |
| Vernon Waterworks Special Service Dist | 302 | 4 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Grantsville, 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 Grantsville City 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Size matters more than most people expect: small vs large water systems.