Agate Bay Water Company, 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.
About Agate Bay Water Company
Agate Bay Water Company serves about 2,500 people through 584 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws surface water, in Placer County, California. EPA system ID: CA3110012; phone on file: 530-546-4646. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 1.1 ppb from 1.1 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Agate Bay Water Company is 10 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 1.1 ppb |
| 2024 | 0 (not detected) |
| 2024 | 10 ppb |
| 2023 | 1.1 ppb |
| 2022 | 1.5 ppb |
| 2016 | 2.5 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. Agate Bay Water Company's reported as 0 (not detected) sits at the 46th percentile in California and the 32nd nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
50 other systems share Placer County; 29 of them have a higher latest lead result than Agate Bay Water Company. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Roseville | 165,736 | 0 (not detected) |
| Placer Cwa - Foothill | 93,417 | 0 (not detected) |
| City Of Lincoln | 56,268 | 0 (not detected) |
| Placer Cwa - Auburn/Bowman | 27,317 | 0 (not detected) |
| Cal Am - West Placer | 9,547 | 0 (not detected) |
| Nevada Id - North Auburn | 6,870 | 0 (not detected) |
| Foresthill Public Utility Dist | 6,811 | 0 (not detected) |
| Tahoe City Pud - Main | 6,411 | 4.4 ppb |
| North Tahoe Pud - Main | 6,321 | 1.45 ppb |
| Northstar Csd - Martis Valley | 4,432 | 0.85 ppb |
What to do in your house
Look up your address in Agate Bay Water Company'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 Agate Bay 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. 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.