MOSBY PWS

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

PWSID: MO1010546 · Mosby, MO · Serves 115 people

Health Violations

MOSBY PWS has 103 health-based violations out of 103 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.

Population Served

115

Total Violations

103

Health Violations

103

Source Type

Surface Water

MOSBY PWS (PWSID MO1010546) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 115 people in Mosby, MO, and is subject to primacy enforcement by the Missouri drinking-water program.

The system's federal compliance record contains 103 total violations, with 103 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Fluoride. Recorded violations span 2010–2025.

A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Missouri state drinking-water program's public portal.

System Details

EPA ID (PWSID): MO1010546
System Type: CWS
Water Source: Surface Water
Location: Mosby, MO
Population Served: 115
Health Violations: Yes (103)

What contaminants are in this water system?

Contaminant	Violations	Health-Based
Total Trihalomethanes (TTHM)	102	102
Fluoride	1	1

Violation History (103)

Contaminant	Type	Health	Date	Enforcement
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	2213
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	-
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2025	2219
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	2211
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	2211
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	2206
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2203
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2204
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	-
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2023	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2200
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2022	2201
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2197
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2022	2197
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2194
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2022	2194
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	2190
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2022	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	2191
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	2186
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	2178
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	2175
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2021	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	2172
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	2169
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	2164
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	2163
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2020	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Jan 1, 2019	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Oct 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	2160
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2018	2207
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2016	2142
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2016	2142
Total Trihalomethanes (TTHM)	MCL	Yes	Jul 1, 2016	2142
Total Trihalomethanes (TTHM)	MCL	Yes	Apr 1, 2016	2142

Showing 100 of 103 violations.

Frequently Asked Questions

Is MOSBY PWS water safe to drink?

MOSBY PWS has 103 health-based violations out of 103 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed. The system uses surface water water as its source.

How many people does MOSBY PWS serve?

MOSBY PWS serves 115 people in Mosby, MO. It is classified as a CWS water system.

What violations does MOSBY PWS have?

MOSBY PWS has 103 total violations on record spanning 2010–2025. 103 are health-based violations involving contaminants exceeding EPA limits.

What contaminants have been found in MOSBY PWS water?

Violations have been recorded for 2 contaminants. The most frequent: Total Trihalomethanes (TTHM), Fluoride.

Nearby Water Systems

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GLADSTONE PWS

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KEARNEY PWS

Kearney · 11,500 served

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EXCELSIOR SPRINGS PWS

Excelsior Springs · 11,084 served

2 viol.

SMITHVILLE PWS

Smithville · 10,885 served

4 viol.

CLAY COUNTY PWSD 6

Kearney · 4,912 served

Clean

NORTH KANSAS CITY PWS

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Clean

CLAY COUNTY PWSD 2

Pleasant Valley · 3,485 served

Smithville · 2,465 served

Clean

CLAY COUNTY PWSD 8

Excelsior Springs · 2,243 served

Clean

PLATTE COUNTY PWSD 8

Smithville · 1,200 served

6 viol.

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Missouri Water Systems → All States → Contaminants →

About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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System Details

What contaminants are in this water system?

Violation History (103)

Frequently Asked Questions

Nearby Water Systems

Explore More

About This Data

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