Stockdale Annex Mutual Water, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 ppb (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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
About Stockdale Annex Mutual Water
Stockdale Annex Mutual Water serves about 433 people through 141 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Kern County, California. EPA system ID: CA1500211; phone on file: 661-834-7226. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2020 (0.56 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Stockdale Annex Mutual Water is 1.4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.4 ppb |
| 2020 | 0.56 ppb |
| 2017 | 1 ppb |
How Stockdale Annex Mutual Water 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. Stockdale Annex Mutual Water's 1.4 ppb sits at the 74th percentile in California and the 62nd nationally (higher means more lead).
Other water systems in Kern County
165 other systems share Kern County; 43 of them have a higher latest lead result than Stockdale Annex Mutual Water. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cws - Bakersfield | 268,129 | 2.8 ppb |
| Bakersfield, City Of | 171,108 | 1.3 ppb |
| Delano, City Of | 51,428 | 0 (not detected) |
| Oildale Mwc | 45,315 | 0 (not detected) |
| Indian Wells Valley W.D. | 41,474 | 0 (not detected) |
| Tejon Castac Wd - I5 & Laval Rd | 38,125 | 0 (not detected) |
| Antelope Valley E Kern Wtr Agy-Rosamond | 37,634 | - |
| Vaughn Wc Inc | 37,189 | 0 (not detected) |
| East Niles Csd | 32,517 | 1.4 ppb |
| Cws - North Garden | 27,634 | 4.2 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Bakersfield, CA may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Stockdale Annex Mutual Water 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.