Missouri Water Systems Serving the Most Disadvantaged Populations — 2026

Missouri community water utilities serving populations with the highest combined percent of non-white residents and households below 200% of the Federal Poverty Level (Census ACS 2019-2023, aggregated via EPA CWS Service Area Boundaries v3).

50 Systems
ranked
22,183 PWSIDs
with demographic data
2019-23 Census ACS
vintage
EPA v3 CWS service area
boundaries (March 2026)
How to read this list Systems serving the highest combined percent of non-white residents and households below 200% of the Federal Poverty Level. Within-size-class percentiles are used to neutralize the confound of system size. A cap of five systems per state is applied to produce a nationally-representative list. See the methodology page for calculation details.

These 50 Missouri water utilities serve populations with the highest combined percent of non-white residents and households below 200% of the Federal Poverty Level. Within-size-class percentile rankings neutralize the confound of system size; no geographic cap is applied at the state level because all utilities are within a single state.

RankWater SystemStatePop servedEquity score% PoC served% Below 200% FPLUnresolved violations
1 Charleston Public Water System Missouri 3,524 90.9 55% 56%
2 Fort Leonard Wood Missouri 8,689 83.9 54% 41%
3 Jackson County Pwsd 1 Missouri 12,952 79.8 56% 37%
4 Monett Public Water System Missouri 8,882 76.1 32% 46%
5 University of Missouri Columbia Missouri 7,750 72.9 25% 51%
6 Carthage Public Water System Missouri 13,509 71.6 32% 40%
7 Boone County Pwsd 9 Missouri 11,781 69.2 25% 45%
8 Kennett Public Water System Missouri 9,367 69 25% 44%
9 Sikeston Public Water System Missouri 13,110 66.8 27% 39%
10 Mississippi County Pwsd 1 Missouri 3,427 66.4 21% 45%
11 Malden Public Water System Missouri 3,992 66 21% 45%
12 Neosho Public Water System Missouri 10,119 65.3 23% 42%
13 Marshall Public Water System Missouri 12,938 65.2 28% 37%
14 Jasper County Pwsd 3 Missouri 6,197 62.4 23% 39%
15 Cape Girardeau Public Water System Missouri 32,099 61.2 23% 38%
16 Poplar Bluff Public Water System Missouri 14,821 60.7 15% 48% 1
17 Butler County Pwsd 1 Missouri 12,438 59.8 14% 48%
18 Pulaski County Pwsd 2 Missouri 5,539 58 28% 32%
19 Branson Public Water System Missouri 7,558 58 18% 39%
20 Moberly Pws Missouri 11,755 57.4 16% 41%
21 Sedalia Public Water System Missouri 22,254 57.4 19% 38%
22 Mo American Tri State Missouri 4,117 57.2 18% 39%
23 Pulaski County Pwsd 1 Missouri 3,702 56.6 20% 36%
24 Rolla Public Water System Missouri 17,638 56.2 15% 40%
25 Mo American Joplin Missouri 57,269 56 17% 38%
26 Liberty Utilities Aurora Verona Missouri 4,731 55.3 11% 48%
27 Kirksville Public Water System Missouri 15,888 55.2 13% 42%
28 Mo American Mexico Missouri 10,297 55.2 16% 39%
29 Kansas City Public Water System Missouri 437,807 54.7 46% 33%
30 Taney County Pwsd 3 Missouri 8,938 53.7 16% 38%
31 Webb City Public Water System Missouri 13,526 53.2 15% 39%
32 Taney County Pwsd 2 Missouri 4,357 52.9 12% 41%
33 Scott County Pwsd 4 Missouri 6,255 52.8 16% 37%
34 Lebanon Pws Missouri 13,902 52 10% 45%
35 Jasper County Pwsd 1 Missouri 5,052 51.8 16% 36%
36 Lamar Public Water System Missouri 4,292 51.2 7% 50%
37 Laclede County Pwsd 1 Missouri 4,351 51.2 10% 43%
38 Laclede County Pwsd 3 Missouri 4,019 51.1 9% 44%
39 Butler Public Water System Missouri 3,736 51 9% 45%
40 Barton Dade Cedar Jasp Countycons Pwsd 1 Missouri 3,758 51 11% 40%
41 Belton Public Water System Missouri 16,804 50.8 25% 29%
42 Mountain Grove Pws Missouri 3,581 50.4 11% 40%
43 Pilot Knob Rural Water District 1 N & S Missouri 4,511 49.9 8% 45%
44 Mo American Warrensburg Missouri 17,900 49.7 16% 35%
45 Salem Pws Missouri 4,428 49.7 8% 44%
46 Adair County Pwsd 1 Missouri 8,366 49.3 10% 40%
47 Maryville Public Water System Missouri 9,813 49 10% 41% 1
48 West Plains Public Water System Missouri 10,753 48.8 6% 48%
49 Dexter Public Water System Missouri 8,439 48.3 7% 44%
50 Howell County Pwsd 3 Missouri 3,502 48.1 11% 39%

How to read this ranking

Each row links to a full utility profile with violation history, lead testing results, and service-area ZIPs. The demographic context columns are from independent data sources (ACS, not EJScreen) and are provided for readers who want to examine equity patterns alongside the operational data.

See the full methodology for calculation details, data vintages, and known limitations.

Frequently asked questions

What does the "equity score" mean?

A 0-100 composite that combines two within-size-class percentile ranks: (1) percent of population served that is non-white (Census ACS B03002), and (2) percent below 200 percent of the Federal Poverty Level (Census ACS C17002). Within-size-class comparison (small, medium, large) is used because small rural systems and large urban systems have structurally different demographic profiles; mixing them in a single ranking produces a methodologically weak list dominated by size rather than disparity.

Why is the list capped at 5 systems per state?

Without a cap, the list concentrates in states with large numbers of historically disadvantaged small-to-medium systems (Texas, California). A geographic diversity cap produces a more nationally-representative snapshot. Per-state rankings, if available, show the full within-state comparison without a cap.

Does this claim discrimination?

No. It reports a demographic fact: these water utilities serve populations that are more non-white and lower-income than the national median, after controlling for system size. Causation — why that pattern exists — is a separate research question requiring different data and methods.

ZipCheckup is an independent public-data tool. We are a referral service and do not provide water testing, remediation, or utility services. Rankings reflect publicly-available federal data and are provided for informational purposes. For issues with your specific water system, contact your local water utility or state drinking water program.

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