Preliminary state health department information indicates a weak link between miscarriages and pregnant women who drank five or more glasses per day of water containing 75 parts per billion THMs or higher. In CVWD's service area, the average THM level is 1.7 parts per billion with a peak finding of only 8.5 parts per billion - way below the levels of concern. THMs are formed when chlorine disinfection methods combine with natural organic matter in the water supply.
Production is most significant when treating surface supplies.
All of CVWD's domestic water is supplied from deep wells where organic matter is rare. The CVWD water quality report is distributed to each user annually.