Roy City Water System, UT
Exceeded the action level in the past
Latest 90th-percentile lead: 1.7 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Roy City Water System at a glance
Roy City Water System serves about 38,800 people through 11,267 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 surface water, in Weber County, Utah. EPA system ID: UTAH29016; phone on file: 801-774-1097. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2025 (1.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Roy City Water System is 23.7 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.7 ppb |
| 2025 | 1.7 ppb |
| 2024 | 3.2 ppb |
| 2022 | 3.2 ppb |
| 2019 | 2.5 ppb |
| 2018 | 6 ppb |
| 2016 | 23.7 ppb over 15 |
How Roy City Water System compares
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. Roy City Water System's 1.7 ppb sits at the 50th percentile in Utah and the 67th nationally (higher means more lead).
Other water systems in Weber County
31 other systems share Weber County; 16 of them have a higher latest lead result than Roy City Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ogden City Water System | 87,267 | 1.9 ppb |
| Bona Vista Water District | 29,000 | 2.7 ppb |
| North Ogden City | 22,000 | 1.1 ppb |
| Hooper Water Improvement District | 20,820 | 3.3 ppb |
| South Ogden City Water System | 17,500 | 2.41 ppb |
| Taylor-West Weber Wid | 9,900 | 0 (not detected) |
| Washington Terrace City Water System | 9,260 | 1.8 ppb |
| Pleasant View Culinary Water | 9,250 | 1.7 ppb |
| Riverdale City Water System | 8,945 | 0.71 ppb |
| West Haven Ssd | 3,360 | 0.86 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Roy, 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 Roy City Water System 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. More in what a past exceedance means today.