top of page
Image by Amritanshu Sikdar

Free Well Water Testing

For Tuolumne County & Southern Calaveras County Residents

Do you know what is in your well water?

For a limited time only, ATCAA, upon eligibility verification, is providing free water quality testing for the following:
  • Bacteria Only (E. Coli)
  • Bacteria plus Nitrate
  • Bacteria plus Nitrate and Arsenic
Or you may add any one of the following:
  • Aluminum
  • Antimony
  • Barium
  • Beryllium
  • Cadmium
  • Chromium
  • Copper
  • Iron
  • Lead
  • Manganese
  • Mercury
  • Nickel
  • Selenium
  • Silver
  • Thallium
  • Zinc
Well Testing Program_Page_2.jpg
This service is only available to income-eligible clients in the red-outline area on the map.


Monthly Household Income Cannot Exceed:

  • One client household up to $2,882.82

  • Two client household up to $3,769.82

  • Three client household  up to $4,656.82

  • Four client household up to $5,543.91

  • Five client household up to $6,430.91

  • Six client household up to $7,317.91

  • Seven client household up to $7,484.24

  • Eight or more? Call.

This service is only to test the water quality of your well.
If the test results yield recommendations forremediation of contaminants, ATCAA will notimplement remediation measures. Propertyowner may be notified of testing results.

All services provided by ATCAA are dependent on client eligibility and program fund availability.
Contact the ATCAA Energy Department to apply.


Sonora Service Center: (209) 533-1397

427 N. Highway 49, STE 305, Sonora, CA 95370

bottom of page