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State utility hub
Browse the indexed community water systems in this state. Each profile brings the provider’s payment routes and household protection policies into a single, practical guide.
Municipal Department
Service area: Kansas City, Missouri
Population: Approximately 500,000 Kansas City residents and account holders, with a regional system containing about 2,800 miles of water pipe and serving water, sanitary sewer, and stormwater customers.
Municipal Department
Service area: City of St. Louis, Missouri
Population: Approximately 300,000 city residents plus businesses, institutions, industry, and wholesale customers supplied by the municipal Water Division; the system is designed to serve the City of St. Louis and surrounding wholesale connections.
Private Investor-Owned Utility
Service area: St. Louis and St. Charles Counties
Population: 1,111,000 people (EPA SDWIS PWS ID MO6010716; 2026 active CWS record; EPA name: MO AMERICAN ST LOUIS ST CHARLES COUNTIES).
Municipal Department
Service area: Kansas City
Population: 553,295 people (EPA SDWIS active CWS PWS MO1010415)
Municipal Department
Service area: City of St. Louis
Population: 304,709 people (EPA SDWIS active CWS PWS MO6010715)
Municipal Department
Service area: Springfield
Population: 210,898 people (EPA SDWIS active CWS PWS MO5010754)
Municipal Department
Service area: Columbia
Population: 126,254
Municipal Department
Service area: Independence, Missouri
Population: 120,000
Public Water Authority
Service area: St. Charles County Public Water Supply District No. 2 service area
Population: 100,587
Private Investor-Owned Utility
Service area: St. Joseph and Buchanan County
Population: 89,171
Municipal Department
Service area: Saint Charles city and Saint Charles County water/sewer service areas
Population: 78,961 people (EPA CWS estimate for St. Charles PWS)
Private Investor-Owned Utility
Service area: Joplin
Population: Approximately 73,728 people in the EPA-listed Missouri American Water Joplin community-water-system service area.
Municipal Department
Service area: City of Blue Springs
Population: 61,084 people (EPA SDWA queue estimate for MO1010080)
Municipal Department
Service area: City of St. Peters
Population: 52,575 people (EPA SDWA queue estimate for MO6010719)
Public Water Authority
Service area: Fort Leonard Wood
Population: 34,000 people (EPA SDWA queue estimate for MO3079500)
Municipal Department
Service area: O'Fallon
Population: 32,515 people (EPA SDWA queue estimate for MO6010588)
Municipal Department
Service area: Liberty
Population: 30,800 people (EPA SDWA queue estimate for MO1010466)
Private Investor-Owned Utility
Service area: Jefferson City
Population: 30,075 people (EPA SDWA queue estimate for MO3010409)
Municipal Department
Service area: Kirkwood
Population: 28,000 people (EPA SDWA queue estimate for MO6010430)
Public Water Authority
Service area: Columbia / Boone County
Population: 24,700 people (EPA SDWIS 2026Q2 estimate for MO3024055)
Municipal Department
Service area: Nixa
Population: 24,532 people (EPA SDWIS 2026Q2 estimate for MO5010576)
Public Water Authority
Service area: Grandview / Jackson County
Population: 24,500 people (EPA SDWIS 2026Q2 estimate for MO1024275)
Municipal Department
Service area: Belton
Population: 23,598 people (EPA SDWIS 2026Q2 estimate for MO1010061)
Municipal Department
Service area: Ozark
Population: 22,000 people (EPA SDWIS 2026Q2 estimate for MO5010619)
Municipal Department
Service area: Sedalia
Population: 21,725 people (EPA SDWIS 2026Q2 estimate for MO3010728)
Municipal Department
Service area: Raymore
Population: 21,517 people (EPA SDWIS 2026Q2 estimate for MO1010675)
Public Water Authority
Service area: Arnold
Population: 21,113 people (EPA SDWIS 2026Q2 estimate for MO6024292)
Municipal Department
Service area: Rolla
Population: 20,800 people (EPA SDWIS 2026Q2 estimate for MO3010700)
Private Investor-Owned Utility
Service area: Warrensburg
Population: 18,500 people (EPA SDWIS 2026Q2 estimate for MO1010833)
Municipal Department
Service area: Farmington
Population: 18,217 people (EPA SDWIS 2026Q2 estimate for MO4010270)
Municipal Department
Service area: INDEPENDENCE
Population: 120000 people (EPA SDWIS 2026Q2 active CWS estimate for MO1010399)
Municipal Department
Service area: O'FALLON
Population: 100587 people (EPA SDWIS 2026Q2 active CWS estimate for MO6024530)
Municipal Department
Service area: LEES SUMMIT
Population: 99400 people (EPA SDWIS 2026Q2 active CWS estimate for MO1010459)
Private Investor-Owned Utility
Service area: ST JOSEPH
Population: 89171 people (EPA SDWIS 2026Q2 active CWS estimate for MO1010714)
Municipal Department
Service area: ST CHARLES
Population: 78961 people (EPA SDWIS 2026Q2 active CWS estimate for MO6010707)
Private Investor-Owned Utility
Service area: JOPLIN
Population: 73728 people (EPA SDWIS 2026Q2 active CWS estimate for MO5010413)
Municipal Department
Service area: WENTZVILLE
Population: 41784 people (EPA SDWIS 2026Q2 active CWS estimate for MO6010849)
Public Water Authority
Service area: COLUMBIA
Population: 40000 people (EPA SDWIS 2026Q2 active CWS estimate for MO3069001)
Municipal Department
Service area: CAPE GIRARDEAU
Population: 39941 people (EPA SDWIS 2026Q2 active CWS estimate for MO4010136)
Municipal Department
Service area: BARNHART
Population: 37000 people (EPA SDWIS 2026Q2 active CWS estimate for MO6024295)
Missouri directory notes
This state hub brings together 40 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.
The most important distinction is between a directory listing and an official account channel. Water Ledger provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.
If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.