Big Springs Mutual Water System, CA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.76 ppb (monitoring period 2023-2025). 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.
Big Springs Mutual Water System at a glance
Big Springs Mutual Water System serves about 25 people through 42 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Shasta County, California. EPA system ID: CA4500027; phone on file: 530-335-4999. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2022 (0.71 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Big Springs Mutual Water System is 0.76 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.76 ppb |
| 2022 | 0.71 ppb |
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2017 | 0 (not detected) |
| 2016 | 0 (not detected) |
Where this result ranks
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. Big Springs Mutual Water System's 0.76 ppb sits at the 67th percentile in California and the 47th nationally (higher means more lead).
Neighbouring systems
58 other systems share Shasta County; 32 of them have a higher latest lead result than Big Springs Mutual Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Redding | 90,254 | 2.13 ppb |
| Bella Vista Water District | 18,767 | 1.83 ppb |
| City Of Anderson | 11,323 | 2.4 ppb |
| City Of Shasta Lake | 10,371 | 1.13 ppb |
| Clear Creek Csd-Anderson | 8,900 | 3.61 ppb |
| Centerville C.S.D. | 4,244 | 2.09 ppb |
| Cottonwood Water District | 3,316 | 0 (not detected) |
| Shasta C.S.D. | 3,069 | 0.97 ppb |
| Burney Water District | 3,000 | 0.87 ppb |
| Mountain Gate C.S.D. | 2,227 | 2.84 ppb |
Next steps for Old Station, CA
Test your own tap with a certified lab first-draw sample; Old Station, 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 Big Springs Mutual Water 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.