Reedley Water Hardness & Quality Report (2026)

Reedley, California, in Fresno County in the southern San Joaquin Valley, is known as the "World's Fruit Basket" for its intensive agriculture, and its municipal water reflects the highly mineralized character of the region. The City of Reedley Water Division draws from a blended supply of Kings River surface water — distributed through the Kings River Conservation District canal system — and local groundwater wells tapping the Kings River Fan Alluvial Aquifer, a thick Quaternary deposit of valley floor sediments that underlies much of eastern Fresno County.

The hard 191 mg/L hardness in Reedley reflects the composite mineral sources feeding the valley aquifer system. The Kings River Fan contains reworked sediments derived from erosion of both the Sierra Nevada and the Coast Ranges — the coastal side contributing calcareous marine sediments and Cretaceous carbonate material. Deep lacustrine deposits from ancient Tulare Lake cycles contain fine calcareous muds from centuries of evaporative concentration, further enriching groundwater with calcium and bicarbonate. The high TDS of 605.8 mg/L reflects additional dissolved minerals beyond calcium carbonate alone.

At 191 mg/L, Reedley's water is hard, and residents deal with significant mineral-related challenges. Scale accumulates quickly in kettles and on faucets, dishwashers consistently leave white film on glassware, and the elevated TDS contributes a pronounced mineral taste that many residents prefer to filter. Monthly descaling of small appliances and a whole-house softener are strongly recommended. An under-sink reverse osmosis unit is particularly valuable in Reedley given the high TDS — it reduces hardness, mineral taste, and any trace agricultural contaminants to produce cleaner drinking and cooking water.