Is Maysville PWS water safe to drink?

Maysville PWS (PWS ID: MO1010510) has 555 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,096 people using Surface Water sources.

How many people does Maysville PWS serve?

EPA SDWIS reports that Maysville PWS serves 1,096 people (this public water system's service population, not the municipal population of Maysville or any other city). It is a Local-owned system using Surface Water water sources with 461 service connections. The operator address is listed in Maysville, Missouri.

What type of violations does Maysville PWS have?

Maysville PWS has 555 total violations: 506 health-based violations (MCL exceedances or treatment failures), 38 monitoring/reporting violations, and 241 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Maysville PWS water?

No PFAS testing data is available for Maysville PWS under the EPA's UCMR5 monitoring program.

What water source does Maysville PWS use?

Maysville PWS uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Maysville PWS sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Maysville PWS ranks #18,671 of 29,740 by people served, and #472 of 738 in Missouri. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Maysville PWS's violation count compare nationally?

Maysville PWS has 555 recorded EPA SDWIS violations, fewer than 4% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 96% of that cohort has fewer violations than Maysville PWS. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Missouri

Community Water System · PWS MO1010510

Maysville PWS

Operator location Maysville, Missouri - 91% of 555 violations are health-based (upper-third health share (> 23%)); surface water source; 1,096 served per SDWIS.

Compiled by PlainWater · May 15, 2026

1,096
People served (this PWS) Middle third of systems: 555
EPA violations (this PWS) Upper third of systems: 506
Health-based (this PWS) Upper third by health-based share: Untested
UCMR5 (this PWS) No UCMR5 result

Follow published updates (RSS)

Maysville PWS standing, high SDWIS violation third

91% of 555 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 91% is upper-third health share (> 23%). Population rank #18,671 of 29,740 among systems serving 500+.

The verdict

Maysville PWS sits in the upper third of the sitemap cohort by violation count (555), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,096 (mid served population (≤ 3,309)). Health-based share is 91% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.

#18,671 of 29,740
Population · /systems: #472 of 738
Population · MO: 555
Total EPA violations on record: 91%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

Water Safety Score

10/100

Maysville PWS

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations F

506

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination N/A

Not UCMR5-tested

Highest PFAS compound level detected in UCMR5 testing

System Details

System Type: Community
Owner Type: Local
Connections: 461
County: DeKalb
School/Daycare: No
MCL Violations: 260
Monitoring Violations: 38
Treatment Tech Violations: 241

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
TTHM	MCL	193	2025
Interim Enhanced Surface Water Treatment Rule	TT	171	2024
Total Haloacetic Acids (HAA5)	MCL	47	2025
CARBON, TOTAL	TT	37	2014
Surface Water Treatment Rule	TT	33	2024
Coliform (TCR)	MCL	16	2010
Coliform (TCR)	MR	12	2002
Interim Enhanced Surface Water Treatment Rule	MR	8	2025
Chlorite	MR	5	2004
Chlorine dioxide	MRDL	5	2009
Surface Water Treatment Rule	MR	5	2025
Revised Total Coliform Rule	MON	4	2024
Chlorite	MCL	4	2022
CARBON, TOTAL	MR	4	2008
Public Notice	Other	2	2013

Violation Count vs. the National Corpus

Maysville PWS has 555 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 91% of this system's own violations are health-based (506 of 555), and it ranks #18,671 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

555 Higher than most more violations than 96% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Maysville PWS plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Maysville PWS. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

Maysville PWS: 555 violations, 91% health-based (this system)
City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

Health-based violations on Maysville PWS

506 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO1010510.

EPA SDWIS · PWS MO1010510 MO primacy agency

Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch

Nationwide peers

555 violations · 1,096 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems near this population served

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Maysville PWS

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in Missouri compares on the same EPA violation measures. Missouri systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.