Muskogee Water Hardness & Quality Report (2026)

Muskogee, Oklahoma, the Muskogee County seat — a major east-central Oklahoma city on the Arkansas River, historically one of the most significant cities in Indian Territory (Muskogee was the capital of the Five Civilized Tribes' unified government — the Inter-tribal Council was headquartered in Muskogee, which served as the administrative center for the Cherokee, Creek, Choctaw, Chickasaw, and Seminole Nations), home of the Muskogee (Creek) Nation Nation (one of the largest federally recognized tribal nations in Oklahoma), made famous worldwide by Merle Haggard's 1969 song 'Okie from Muskogee,' and a major east-central Oklahoma city — draws its municipal water supply from the Greenleaf Lake watershed via the City of Muskogee Water Division. Water hardness in Muskogee measures 80.5 mg/L — classified as moderately soft.

Muskogee's moderate softness reflects the east-central Oklahoma watershed's calcareous-moderate geology. The Greenleaf Lake and Arkansas River tributaries at Muskogee drain: the Ouachita Mountains frontal zone (Mississippian Caney Shale and calcareous-poor Ouachita flysch — calcareous-poor deep marine sediment of the Ouachita suture zone); and the Arkoma Basin Pennsylvanian (calcareous-moderate limestone and shale). City of Muskogee's treatment of the moderately calcareous east-central Oklahoma watershed produces the moderate 80.5 mg/L.

With hardness at 80.5 mg/L, Muskogee residents enjoy moderately soft water. City of Muskogee Water Division consistently delivers water meeting all Oklahoma DEQ and EPA Safe Drinking Water Act requirements.