Oxnard Water Dept, CA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2025-2027). 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 Oxnard Water Dept
Oxnard Water Dept serves about 200,232 people through 42,804 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Ventura County, California. EPA system ID: CA5610007; phone on file: 805-385-8111. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is down 2.2 ppb from 2.2 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Oxnard Water Dept is 6.1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 0 (not detected) |
| 2024 | 2.2 ppb |
| 2021 | 4.2 ppb |
| 2018 | 6.1 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. Oxnard Water Dept's reported as 0 (not detected) sits at the 63rd percentile in California and the 40th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
67 other systems share Ventura County; 6 of them have a higher latest lead result than Oxnard Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| 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) |
| Port Hueneme City Water Dept | 21,582 | 0 (not detected) |
What to do in your house
Look up your address in Oxnard Water Dept'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 Oxnard Water Dept 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.