Hamilton Branch Csd, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). 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.
Hamilton Branch Csd at a glance
Hamilton Branch Csd serves about 1,874 people through 646 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Plumas County, California. EPA system ID: CA3210010; phone on file: 530-596-3002. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Hamilton Branch Csd's lead record
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Hamilton Branch Csd is 0 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
How Hamilton Branch Csd compares
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. Hamilton Branch Csd's reported as 0 (not detected) sits at the 45th percentile in California and the 30th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
26 other systems share Plumas County; 10 of them have a higher latest lead result than Hamilton Branch Csd. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| American Valley Csd | 3,778 | 0.3 ppb |
| Chester Public U.D. | 2,187 | 0 (not detected) |
| City Of Portola | 2,100 | 2 ppb |
| West Almanor M.W.C. | 1,464 | 0 (not detected) |
| Ivcsd-Greenville | 795 | 1.49 ppb |
| Graeagle Water Company | 737 | 0 (not detected) |
| Grizzly Lake Csd-Delleker | 657 | 0 (not detected) |
| Whitehawk Ranch Mwc | 540 | 0 (not detected) |
| Lake Almanor Country Club Mwc | 500 | 0 (not detected) |
| Plumas Eureka Csd | 334 | 0 (not detected) |
Your move
Look up your address in Hamilton Branch Csd'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 Hamilton Branch Csd 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. A zero today does not rule out a jump later - the rules are tightening in 2027.