Jackson County, Missouri: drinking water report. Jackson County includes Kansas City proper and several eastern suburbs, with a population of about 717,000.
Jackson County includes Kansas City proper and several eastern suburbs, with a population of about 717,000. KC Water serves the city, drawing from the Missouri River – one of the longest rivers in North America. The Missouri carries agricultural runoff from farms across Nebraska, Iowa, Kansas, and upstream Missouri before reaching Kansas City's intake. Independence and other eastern Jackson County cities operate their own systems, some drawing from different sources.
The Missouri River is a challenging source to treat. According to the USGS National Water Quality Assessment, atrazine concentrations in the Missouri River at Kansas City spike during spring planting season, with peak levels regularly exceeding 3 ppb – the EPA's MCL – in raw water samples before treatment. KC Water's treatment process reduces atrazine to compliant levels, but the margin between raw water spikes and the regulatory limit narrows during heavy application years.
The EPA's UCMR5 data shows PFAS detections in the KC Water system and in Independence's system. Richards-Gebaur Air Reserve Station (closed in 1994) in southern Jackson County has confirmed PFAS contamination. A 2024 Missouri DNR report documented three public water systems in the county with PFAS concentrations above detection limits, though none exceeded the federal MCLs at the time of sampling.
Spring is when water quality fluctuates most in Jackson County, as snowmelt and spring rains wash agricultural chemicals from upstream farms into the Missouri River. If you notice taste or odor changes in April through June, that is the treatment system working harder to handle elevated contaminant loads.
Check your water to see the latest data for your ZIP code. For agricultural herbicides and disinfection byproducts, activated carbon filters are effective. For PFAS, reverse osmosis provides the broadest protection. Our water filter guide helps match filter type to contaminant. Get your detailed report for seasonal data, and visit our Missouri page for statewide context.