Joint Regional Water Supply System, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 5.9 ppb (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. 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.
Joint Regional Water Supply System at a glance
Joint Regional Water Supply System serves about 0 people through 44 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Orange County, California. EPA system ID: CA3010071; phone on file: 949-342-2179. They can tell you what your service line is made of and whether they pay to replace it.
Joint Regional Water Supply System's lead record
That is up 5.9 ppb from 0 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Joint Regional Water Supply System is 5.9 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 5.9 ppb |
| 2021 | 0 (not detected) |
| 2018 | 1 ppb |
| 2018 | 2.4 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. Joint Regional Water Supply System's 5.9 ppb sits at the 93rd percentile in California and the 93rd nationally (higher means more lead).
Other water systems in Orange County
39 other systems share Orange County; 2 of them have a higher latest lead result than Joint Regional Water Supply System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Irvine Ranch Water District | 450,323 | 0 (not detected) |
| City Of Anaheim | 350,254 | 0 (not detected) |
| City Of Santa Ana | 316,184 | 0 (not detected) |
| City Of Huntington Beach | 201,000 | 0 (not detected) |
| City Of Garden Grove | 174,226 | 0 (not detected) |
| Moulton Niguel Water District | 168,315 | 0 (not detected) |
| Santa Margarita Water District | 165,275 | 0 (not detected) |
| City Of Fullerton | 140,054 | 1.5 ppb |
| City Of Orange | 120,770 | 2.33 ppb |
| Golden State Wc - West Orange County | 114,693 | 2.2 ppb |
Next steps for Laguna Beach, CA
Test your own tap with a certified lab first-draw sample; Laguna Beach, 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 Joint Regional Water Supply System 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. The action level is dropping - the 10 ppb rule from 2027.