River Ranch Mobile Home Park, CA
Exceeded the action level in the past
Latest 90th-percentile lead: 3.22 ppb (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 result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Who runs the water here
River Ranch Mobile Home Park serves about 305 people through 109 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Tehama County, California. EPA system ID: CA5200510; phone on file: 415-309-6482. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 12.68 ppb from 15.9 ppb in the period ending 2018. The highest 90th-percentile result EPA holds for River Ranch Mobile Home Park is 15.9 ppb across 3 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 3.22 ppb |
| 2018 | 15.9 ppb over 15 |
| 2017 | 0 (not detected) |
How River Ranch Mobile Home Park 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. River Ranch Mobile Home Park's 3.22 ppb sits at the 87th percentile in California and the 84th nationally (higher means more lead).
Neighbouring systems
47 other systems share Tehama County; 6 of them have a higher latest lead result than River Ranch Mobile Home Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Red Bluff | 14,286 | 0 (not detected) |
| City Of Corning | 8,244 | 1.08 ppb |
| Rio Alto Water District | 3,377 | 0 (not detected) |
| Los Molinos Comm. Services Dist. | 1,450 | 0 (not detected) |
| Gerber Las Flores Csd | 1,200 | 0 (not detected) |
| Mineral County Water District | 634 | 4.21 ppb |
| Rio Vista Mobile Home Park | 543 | 7.35 ppb |
| Vista Grande Water System | 468 | 0.89 ppb |
| City Of Tehama | 436 | 0 (not detected) |
| Sky View County Water | 429 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Concord, 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 River Ranch Mobile Home Park 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. More in what a past exceedance means today.