Maryville, MO
Contamination score
Higher = more contaminated vs. other cities.
Reported illness & cancer claims
No claims reported yet. Be the first to add one.
Claims are aggregated from public records and community reports and may be unverified. If you believe your illness is linked to local water, request a consultation.
Self-reported issues
No issues reported yet. Be the first to report one.

Public water systems
Maryville Pws
- PWSID:
- MO1010508
- Source:
- Surface water
- Serves:
- 10,775 people
Nodaway County Pwsd 1
- PWSID:
- MO1024428
- Source:
- Surface water
- Serves:
- 6,428 people
EPA & DEP violations
Interim Enhanced Surface Water Treatment Rule — TT violation
high severityHealth-basedArchivedInterim Enhanced Surface Water Treatment Rule TT violation (Archived).
EPA SDWIS · TT · Began Dec 1, 2025 · 6 months ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Apr 22, 2024 · 2 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Apr 22, 2024 · 2 years ago · Source ↗
Chlorite — MCL violation
high severityHealth-basedResolvedChlorite MCL violation (Resolved).
EPA SDWIS · MCL · Began Mar 1, 2024 · 2 years ago · Source ↗
Chlorite — MR violation
medium severityResolvedChlorite MR violation (Resolved).
EPA SDWIS · MR · Began Mar 1, 2024 · 2 years ago · Source ↗
Chlorite — MCL violation
high severityHealth-basedResolvedChlorite MCL violation (Resolved).
EPA SDWIS · MCL · Began Feb 1, 2024 · 2 years ago · Source ↗
Chlorite — MR violation
medium severityResolvedChlorite MR violation (Resolved).
EPA SDWIS · MR · Began Feb 1, 2024 · 2 years ago · Source ↗
Chlorine dioxide — MR violation
medium severityResolvedChlorine dioxide MR violation (Resolved).
EPA SDWIS · MR · Began Feb 1, 2024 · 2 years ago · Source ↗
Chlorite — MR violation
medium severityResolvedChlorite MR violation (Resolved).
EPA SDWIS · MR · Began Nov 1, 2023 · 2 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Mar 6, 2023 · 3 years ago · Source ↗
Long Term 2 Enhanced Surface Water Treatment Rule — TT violation
high severityHealth-basedResolvedLong Term 2 Enhanced Surface Water Treatment Rule TT violation (Resolved).
EPA SDWIS · TT · Began Dec 27, 2022 · 3 years ago · Source ↗
Groundwater Rule — Other violation
medium severityResolvedGroundwater Rule Other violation (Resolved).
EPA SDWIS · Other · Began Aug 27, 2022 · 3 years ago · Source ↗
Coliform (TCR) — MCL violation
high severityHealth-basedResolvedColiform (TCR) MCL violation (Resolved).
EPA SDWIS · MCL · Began Oct 1, 2015 · 10 years ago · Source ↗
Coliform (TCR) — MR violation
medium severityResolvedColiform (TCR) MR violation (Resolved).
EPA SDWIS · MR · Began May 1, 2013 · 13 years ago · Source ↗
Coliform (TCR) — MCL violation
high severityHealth-basedResolvedColiform (TCR) MCL violation (Resolved).
EPA SDWIS · MCL · Began May 1, 2010 · 16 years ago · Source ↗
Violation — Violation violation
medium severityContaminant Violation violation.
EPA SDWIS · Violation · Began — · Source ↗
Violation — Violation violation
medium severityContaminant Violation violation.
EPA SDWIS · Violation · Began — · Source ↗
Water-related lawsuits
No lawsuits on record.
In the news & sources
No coverage linked yet.