Las Deltas Mutual Water Company, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.8 ppb (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. 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.
Las Deltas Mutual Water Company at a glance
Las Deltas Mutual Water Company serves about 375 people through 75 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Fresno County, California. EPA system ID: CA1000054; phone on file: 559-449-2700. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2020 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Las Deltas Mutual Water Company is 0.8 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0.8 ppb |
| 2020 | 0 (not detected) |
| 2017 | 0 (not detected) |
How Las Deltas Mutual Water Company 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. Las Deltas Mutual Water Company's 0.8 ppb sits at the 68th percentile in California and the 48th nationally (higher means more lead).
Neighbouring systems
99 other systems share Fresno County; 28 of them have a higher latest lead result than Las Deltas Mutual 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 Fresno | 545,970 | 0 (not detected) |
| City Of Clovis | 133,118 | 0 (not detected) |
| City Of Sanger | 26,357 | 0 (not detected) |
| Reedley, City Of | 26,076 | 0 (not detected) |
| Cws - Selma | 25,651 | 0 (not detected) |
| Bakman Water Company | 17,393 | 0 (not detected) |
| Coalinga-City | 17,277 | 0 (not detected) |
| Kerman, City Of | 17,256 | 0 (not detected) |
| Pinedale County Water District | 16,736 | 2.9 ppb |
| City Of Parlier | 14,576 | 0 (not detected) |
Next steps for Clovis, CA
Test your own tap with a certified lab first-draw sample; Clovis, 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 Las Deltas Mutual 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.