Shady Lake Water Association, CA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 14.4 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Who runs the water here
Shady Lake Water Association serves about 90 people through 28 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Nevada County, California. EPA system ID: CA2900511; phone on file: 530-906-0126. They can tell you what your service line is made of and whether they pay to replace it.
Shady Lake Water Association's lead record
That is up 2.33 ppb from 12.07 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Shady Lake Water Association is 14.4 ppb across 3 monitoring periods, none of them over 15 ppb (3 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 14.4 ppb over 10 |
| 2023 | 12.07 ppb over 10 |
| 2017 | 10.57 ppb over 10 |
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. Shady Lake Water Association's 14.4 ppb sits at the 99th percentile in California and the 99th nationally (higher means more lead).
Neighbouring systems
20 other systems share Nevada County; 1 of them has a higher latest lead result than Shady Lake Water Association. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Truckee-Donner Pud, Main | 36,730 | 3.9 ppb |
| Nevada Id - E. George, Banner Mountain | 17,154 | 0 (not detected) |
| Nevada Id - Loma Rica | 14,072 | 0.77 ppb |
| Nevada Id - Lake Wildwood | 9,108 | 0 (not detected) |
| Nevada Id - Lake Of Pines | 6,870 | 0 (not detected) |
| City Of Grass Valley | 4,947 | 0.88 ppb |
| City Of Nevada City | 3,148 | 0 (not detected) |
| Washington Water District | 330 | 41.4 ppb |
| Creekside Village | 300 | 0 (not detected) |
| Ananda Village | 226 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; North San Juan, 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 Shady Lake Water Association 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. See what changes at 10 ppb in 2027.