Members of the San Jerardo, CA community reported skin rashes from water use. Upon testing the water, nitrates and trichloropropane (TCP) were both found to be at levels well above the regulatory limit. High levels of nitrates are common in many wells, and it is believed that the surrounding agricultural area led to the TCP contamination. Drinking water regulations require nitrate to be less than 45 ppm and TCP less than 5 ppt. At the time of testing, the nitrate level was at 78 ppm and TCP was at 80 ppt.