Adventist Health - St. Helena Hospital, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Who runs the water here
Adventist Health - St. Helena Hospital serves about 617 people through 196 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Napa County, California. EPA system ID: CA2800625; phone on file: 707-963-6492. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Adventist Health - St. Helena Hospital's lead record
That is down 10 ppb from 10 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Adventist Health - St. Helena Hospital is 11 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 10 ppb |
| 2017 | 11 ppb over 10 |
| 2016 | 6.2 ppb |
Where this result ranks
Of the 2,884 California systems with a lead result, the median latest reading is 0 ppb; 30 are over 15 ppb right now and 215 have gone over at some point. Adventist Health - St. Helena Hospital's reported as 0 (not detected) sits at the 39th percentile in California and the 24th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
27 other systems share Napa County; 7 of them have a higher latest lead result than Adventist Health - St. Helena Hospital. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Napa, City Of | 84,804 | 0 (not detected) |
| American Canyon, City Of | 18,423 | 0 (not detected) |
| Calistoga, City Of | 5,610 | 0 (not detected) |
| St. Helena, City Of | 5,386 | 0 (not detected) |
| Town Of Yountville | 2,785 | 0 (not detected) |
| Howell Mountain Mutual Water Company | 1,244 | 0 (not detected) |
| Veterans Home Of California | 1,000 | 0 (not detected) |
| Pacific Union College | 758 | 7.8 ppb |
| Berryessa Highlands | 715 | 0 (not detected) |
| Circle Oaks Water District | 500 | 0 (not detected) |
Next steps for St. Helena, CA
Look up your address in Adventist Health - St. Helena Hospital's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Adventist Health - St. Helena Hospital 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. A zero today does not rule out a jump later - the rules are tightening in 2027.