Queen Creek Water Hardness & Quality Report (2026)

Queen Creek, Arizona, in Maricopa and Pinal Counties — a major southeast Phoenix metro community (Queen Creek is one of the fastest-growing cities in Arizona — a major Maricopa County agricultural-to-suburban conversion community in the southeast Phoenix metro; Queen Creek grew from approximately 5,000 residents in 2000 to over 70,000 by the mid-2020s), historically one of the primary onion-growing areas of the Phoenix Valley (Queen Creek onions were famous throughout the southwest US), adjacent to Santan Mountain Regional Park, a diverse Maricopa County community with a significant Mormon-American and working-class professional population, and a major growth community in the southeast Phoenix metro — draws its municipal water supply from the East Salt River Sub-Basin and CAP via the Town of Queen Creek Water Division. Water hardness in Queen Creek measures 208.5 mg/L — classified as very hard.

Queen Creek's very hard supply reflects the southeast Maricopa County alluvial aquifer and CAP Colorado River supply's calcareous desert chemistry. The East Salt River Sub-Basin alluvial aquifer at Queen Creek draws from: the Quaternary Valley Fill alluvium (calcareous-moderate desert alluvium, leaching calcareous caliche from the desert paleo-soils); and the CAP Colorado River import (approximately 280–320 mg/L). Town of Queen Creek's supply blend produces the very hard 208.5 mg/L.

At 208.5 mg/L, Queen Creek residents face severe hard water challenges. Weekly descaling and appliance protection measures are strongly recommended. Town of Queen Creek Water Division consistently delivers water meeting all Arizona ADEQ and EPA Safe Drinking Water Act requirements.