Riverdale City Water System, UT
Lead detected, under the action levels
Latest 90th-percentile lead: 0.71 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
Riverdale City Water System serves about 8,945 people through 2,523 service connections, which makes it a medium-sized 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: UTAH29015; phone on file: 801-394-5541. 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 2024 (0.71 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Riverdale City Water System is 2.2 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.71 ppb |
| 2024 | 0.71 ppb |
| 2021 | 2.2 ppb |
| 2021 | 2.2 ppb |
| 2018 | 0.96 ppb |
How Riverdale 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. Riverdale City Water System's 0.71 ppb sits at the 22nd percentile in Utah and the 47th nationally (higher means more lead).
Neighbouring systems
31 other systems share Weber County; 24 of them have a higher latest lead result than Riverdale 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 |
| Roy City Water System | 38,800 | 1.7 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 |
| West Haven Ssd | 3,360 | 0.86 ppb |
Next steps for Riverdale, UT
Test your own tap with a certified lab first-draw sample; Riverdale, 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 Riverdale 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. 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.