Missouri tap water, by utility.

237 utilities with a full report, serving 5 million people as they report it. Regulated PFAS turned up at 20 of them.

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The 100 largest, by people served

Missouri utilities, The 100 largest, by people served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
MO American St Louis St Charles Counties	Chesterfield	1,111,000	None found	0
Kansas City PWS	Kansas City	553,295	None found	1
St Louis City PWS	St. Louis	304,709	None found	0
City Utilities of Springfield	Springfield	210,898	PFOS, PFBS	0
City of Columbia Utilities	Columbia	126,254	None found	0
Independence PWS	Independence	120,000	None found	0
St Charles County PWSD 2	O'Fallon	100,587	None found	0
Lees Summit PWS	Lees Summit	99,400	None found	0
MO American St Joseph	St. Joseph	89,171	None found	0
St Charles PWS	St. Charles	78,961	None found	0
MO American Joplin	Joplin	73,728	None found	0
Blue Springs PWS	Blue Springs	61,084	None found	0
St Peters PWS	St. Peters	52,575	PFOA	0
Wentzville PWS	Wentzville	41,784	None found	0
University of Missouri Columbia	Columbia	40,000	None found	0
Cape Girardeau PWS	Cape Girardeau	39,941	None found	1
Jefferson Co Cons PWSD C 1	Barnhart	37,000	None found	0
Fort Leonard Wood	Fort Leonard Wood	34,000	PFBS	0
Ofallon PWS	O Fallon	32,515	None found	0
Liberty PWS	Liberty	30,800	None found	0
MO American Jefferson City District	Jefferson City	30,075	None found	0
Kirkwood PWS	Kirkwood	28,000	None found	0
Gladstone PWS	Gladstone	27,000	None found	0
Boone County Cons PWSD 1	Columbia	24,700	None found	0
Nixa PWS	Nixa	24,532	None found	0
Jackson County PWSD 1	Grandview	24,500	None found	0
Belton PWS	Belton	23,598	None found	0
Ozark PWS	Ozark	22,000	PFBS	0
Sedalia PWS	Sedalia	21,725	None found	0
Raymore PWS	Raymoor	21,517	None found	0
Jefferson County PWSD 1	Arnold	21,113	None found	0
Rolla PWS	Rolla	20,800	None found	0
MO American Warrensburg	Warrensburg	18,500	None found	0
Farmington PWS	Farmington	18,217	PFHxS	2
Kirksville PWS	Kirksville	17,566	None found	3
Hannibal PWS	Hannibal	17,108	None found	3
Raytown Water Company	Raytown	17,066	None found	0
Poplar Bluff PWS	Poplar Bluff	17,043	None found	23
Jefferson County PWSD 3	Arnold	17,000	None found	0
MO American Platte County	Parkville	16,645	None found	0
Cole County PWSD 1	Jefferson City	16,548	PFOA	0
Jefferson County PWSD 2	High Ridge	16,548	None found	0
Jackson County PWSD 2	Raytown	16,440	None found	0
Sikeston PWS	Sikeston	16,291	None found	1
Republic PWS	Republic	16,100	None found	0
Grain Valley PWS	Grain Valley	16,000	None found	0
Lebanon PWS	Lebanon	15,442	None found	4
Boone County PWSD 9	Columbia	15,035	None found	0
Jackson PWS	Jackson	15,000	None found	1
Troy PWS	Troy	15,000	None found	0
Carthage PWS	Carthage	14,600	None found	0
Washington PWS	Washington	14,068	None found	1
Lincoln County PWSD 1	Winfield	14,000	None found	2
Moberly PWS	Moberly	13,783	None found	1
Webb City PWS	Webb City	13,404	None found	0
Cole County PWSD 2	Jefferson City	13,107	None found	0
Callaway 2 Water District	Fulton	13,080	None found	0
Festus PWS	Festus	13,000	None found	0
MO American Mexico	Mexico	13,000	None found	0
Marshall PWS	Marshall	12,934	None found	7
Macon Co PWSD 1	Macon	12,865	None found	0
West Plains PWS	West Plains	12,864	PFBS	3
Branson PWS	Branson	12,640	None found	0
Fulton PWS	Fulton	12,600	None found	0
Johnson County PWSD 2	Holden	12,490	None found	0
Union PWS	Union	12,348	None found	0
Neosho PWS	Neosho	12,157	None found	0
Butler County PWSD 1	Poplar Bluff	12,000	None found	0
Cameron PWS	Cameron	11,963	None found	1
Kearney PWS	Kearney	11,500	None found	0
Henry County Water Company	Clinton	11,373	None found	0
Thomas Hill PWSD 1	Moberly	11,250	None found	0
Excelsior Springs PWS	Excelsior Spgs.	11,084	None found	2
Liberty Utilities Bolivar	Bolivar	11,000	None found	0
Smithville PWS	Smithville	10,885	None found	2
Maryville PWS	Maryville	10,775	None found	4
Kennett PWS	Kennett	10,200	PFBS	0
Chillicothe Municipal Utilities PWS	Chillicothe	10,187	None found	0
Whiteman Air Base	Whiteman AFB	10,106	None found	0
Harrisonville PWS	Harrisonville	10,019	None found	0
Jefferson County PWSD 10	Imperial	10,000	None found	0
Callaway County PWSD 1	Holts Summit	9,840	None found	0
Monett PWS	Monett	9,789	PFHxS	0
Jackson County PWSD 13	Lees Summit	9,700	None found	0
Vernon County Cons PWSD 1	Nevada	9,615	None found	1
Platte Co PWSD 4	Platte City	9,552	PFHxS	0
Barton Dade Cedar Jasp Countycons PWSD 1	Lamar	9,523	None found	0
Ray County Cons PWSD 2	Polo	9,360	None found	0
Greene County PWSD 1	Battlefield	9,168	None found	0
Jackson County PWSD 15	Lake Lotawana	8,772	None found	0
MO American Tri State	Branson	8,680	None found	0
Park Hills PWS	Park Hills	8,587	None found	0
Perryville PWS	Perryville	8,555	None found	0
Laclede County PWSD 1	Lebanon	8,550	None found	0
Cape Perry County PWSD 1 South	Jackson	8,545	None found	0
Liberty Utilities Aurora Verona	Aurora	8,529	None found	0
Willard PWS	Willard	8,400	None found	0
Oak Grove PWS	Oak Grove	8,289	None found	0
Pleasant Hill PWS	Pleasant Hill	8,262	None found	0
Franklin County PWSD 3	Labadie	8,250	None found	0

Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. People served is what each utility reports to EPA. Data: EPA SDWIS 2026 Q2 and UCMR 5.