Hidden Hollow Water Company, UT
Above the federal action level
Latest 90th-percentile lead: 17.9 ppb (monitoring period 2025-2027). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
Who runs the water here
Hidden Hollow Water Company serves about 99 people through 33 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Morgan County, Utah. EPA system ID: UTAH15041; phone on file: 801-821-9468. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 17.6 ppb from 0.3 ppb in the period ending 2026. The highest 90th-percentile result EPA holds for Hidden Hollow Water Company is 17.9 ppb across 7 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 17.9 ppb over 15 |
| 2026 | 0.3 ppb |
| 2025 | 17.9 ppb over 15 |
| 2024 | 0.2 ppb |
| 2022 | 0.2 ppb |
| 2019 | 0.4 ppb |
| 2018 | 1.6 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. Hidden Hollow Water Company's 17.9 ppb sits at the 99th percentile in Utah and the 99th nationally (higher means more lead).
Other water systems in Morgan County
10 other systems share Morgan County; 0 of them have a higher latest lead result than Hidden Hollow Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Morgan City Water System | 4,520 | 1.3 ppb |
| Cottonwood Mutual | 3,145 | 3.4 ppb |
| Highlands Water Company Inc | 1,200 | 1.5 ppb |
| Peterson Pipeline Association | 510 | 1 ppb |
| Wasatch Peaks Ranch | 490 | 1.4 ppb |
| Central Enterprise Water Co | 425 | 3.5 ppb |
| Richville | 254 | 4.9 ppb |
| Monte Verde | 93 | 2.2 ppb |
| Croydon Pipeline Corporation | 92 | 0.9 ppb |
| South Robinson Springs Water Users | 28 | - |
Next steps for Morgan, UT
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Hidden Hollow Water Company 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.