Calistoga, City Of, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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.
About Calistoga, City Of
Calistoga, City Of serves about 5,610 people through 1,661 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 Napa County, California. EPA system ID: CA2810002; phone on file: 707-942-2828. 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 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Calistoga, City Of is 5.2 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 5.2 ppb |
| 2019 | 5.2 ppb |
| 2016 | 3.8 ppb |
Against other California systems
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. Calistoga, City Of's reported as 0 (not detected) sits at the 50th percentile in California and the 35th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Napa County
27 other systems share Napa County; 7 of them have a higher latest lead result than Calistoga, City Of. 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) |
| 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) |
| Adventist Health - St. Helena Hospital | 617 | 0 (not detected) |
| Circle Oaks Water District | 500 | 0 (not detected) |
Next steps for Calistoga, CA
Look up your address in Calistoga, City Of'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 Calistoga, City Of 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. Small systems behave differently: why small systems go over more often.