Ecco, CA
Exceeded the action level in the past
Latest 90th-percentile lead: 1.9 ppb (monitoring period 2025-2025). 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
Ecco serves about 100 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Madera County, California. EPA system ID: CA2000688; phone on file: 559-683-8162. They can tell you what your service line is made of and whether they pay to replace it.
Every lead result on file
That is up 1.21 ppb from 0.69 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Ecco is 17.6 ppb across 7 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.9 ppb |
| 2024 | 0.69 ppb |
| 2024 | 1.34 ppb |
| 2023 | 1.11 ppb |
| 2022 | 17.6 ppb over 15 |
| 2019 | 10.73 ppb over 10 |
| 2016 | 6 ppb |
How Ecco 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. Ecco's 1.9 ppb sits at the 78th percentile in California and the 68th nationally (higher means more lead).
Neighbouring systems
67 other systems share Madera County; 22 of them have a higher latest lead result than Ecco. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Madera | 66,560 | 3 ppb |
| Chowchilla City Water Dept | 13,916 | 0 (not detected) |
| Riverstone/Rootcreek Water District | 10,276 | 1.2 ppb |
| Madera Valley Water Company | 6,524 | 0 (not detected) |
| Yosemite Spring Park Util Co | 5,300 | 0 (not detected) |
| Tesoro Viejo Master Mwc, Inc. | 4,660 | 0 (not detected) |
| Cal Am - Oakhurst | 3,710 | 5 ppb |
| Valley State Prison | 3,151 | 0 (not detected) |
| Madera Co Md10a-Madera Ranchos | 3,072 | 5.4 ppb |
| Cal Am - Bass Lake | 3,066 | 2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Oakhurst, 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 Ecco 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. Why an old exceedance still matters: over the limit before, under it now.