Del Norte Mutual Water Co., CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). 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 Del Norte Mutual Water Co.
Del Norte Mutual Water Co. serves about 215 people through 85 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Ventura County, California. EPA system ID: CA5602104; phone on file: 805-444-6477. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2024 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Del Norte Mutual Water Co. is 0 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2018 | 0 (not detected) |
How Del Norte Mutual Water Co. 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. Del Norte Mutual Water Co.'s reported as 0 (not detected) sits at the 28th percentile in California and the 16th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
67 other systems share Ventura County; 6 of them have a higher latest lead result than Del Norte Mutual Water Co.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Oxnard Water Dept | 200,232 | 0 (not detected) |
| Ventura Water Department | 112,285 | 0 (not detected) |
| Ventura Wwd No. 8 - Simi Valley | 94,736 | 0 (not detected) |
| Cal American Water Co | 66,809 | 3 ppb |
| City Of Thousand Oaks Water Department | 54,770 | 0 (not detected) |
| Camarillo Water Dept | 47,701 | 0 (not detected) |
| Golden State Water Company - Simi Valley | 45,086 | 6 ppb |
| Ventura Cwwd No. 1 - Moorpark | 35,514 | 0 (not detected) |
| Camrosa Water District | 32,700 | 0 (not detected) |
| City Of Santa Paula | 31,786 | 0 (not detected) |
What to do in your house
Look up your address in Del Norte Mutual Water Co.'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 Del Norte Mutual Water Co. 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.