Lemoore Water Hardness & Quality Report (2026)

Lemoore, California, in Kings County in the southern San Joaquin Valley, receives its municipal water from the City of Lemoore Water Division and local utility providers drawing from a blended supply of surface water from the Kings River — delivered via irrigation district canals — and groundwater pumped from the San Joaquin Valley Alluvial Aquifer. The Kings River originates in the Sierra Nevada and historically fed the vast Tulare Lake basin before the valley was drained for agriculture. Groundwater wells in the Kings County area tap deep alluvial sediments that have accumulated over millions of years in this inland basin.

The hard 163.5 mg/L hardness in Lemoore reflects the mineral richness of valley floor geology. The San Joaquin Valley Alluvial Aquifer is composed of Quaternary and Pliocene sediments derived from erosion of the surrounding Sierra Nevada and Coast Ranges — including reworked carbonate material, calcareous marine sediments from the Coast Range side, and deep lacustrine deposits from ancient Tulare Lake cycles. Kings River water, despite originating in low-carbonate Sierra granite, accumulates hardness as it travels through valley irrigation distribution systems lined with calcareous sediments.

At 163.5 mg/L, Lemoore's water is in the hard range — consistent with much of the southern San Joaquin Valley. Residents experience regular white scale formation on faucets and inside appliances, and the high TDS of 486.3 mg/L gives water a noticeable mineral taste. Kettles and coffee makers benefit from monthly descaling, and shower glass and tile require frequent cleaning to prevent calcium buildup. A whole-house softener or under-sink reverse osmosis unit for drinking water is a common and practical choice for Lemoore households wanting to reduce both hardness and overall mineral load.