Hollister, 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
Gobblers Knob MHP
- PWSID:
- MO5048286
- Source:
- Ground water
- Serves:
- 230 people
Walker MHP
- PWSID:
- MO5048992
- Source:
- Ground water
- Serves:
- 52 people
Hollister Pws
- PWSID:
- MO5010374
- Source:
- Ground water
- Serves:
- 4,426 people
EPA & DEP violations
Groundwater Rule — MR violation
medium severityArchivedGroundwater Rule MR violation (Archived).
EPA SDWIS · MR · Began Oct 1, 2025 · 8 months ago · Source ↗
LEAD AND COPPER RULE REVISIONS — RPT violation
medium severityUnaddressedLEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).
EPA SDWIS · RPT · Began Jul 2, 2025 · 11 months ago · Source ↗
Groundwater Rule — MR violation
medium severityResolvedGroundwater Rule MR violation (Resolved).
EPA SDWIS · MR · Began Mar 1, 2025 · 1 year ago · Source ↗
Groundwater Rule — MR violation
medium severityResolvedGroundwater Rule MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2024 · 1 year ago · Source ↗
Consumer Confidence Rule — Other violation
medium severityResolvedConsumer Confidence Rule Other violation (Resolved).
EPA SDWIS · Other · Began Jul 1, 2024 · 1 year ago · Source ↗
Consumer Confidence Rule — Other violation
medium severityResolvedConsumer Confidence Rule Other violation (Resolved).
EPA SDWIS · Other · Began Jul 1, 2023 · 2 years ago · Source ↗
E. COLI — MR violation
medium severityResolvedE. COLI MR violation (Resolved).
EPA SDWIS · MR · Began Apr 1, 2023 · 3 years ago · Source ↗
Consumer Confidence Rule — Other violation
medium severityResolvedConsumer Confidence Rule Other violation (Resolved).
EPA SDWIS · Other · Began Jul 1, 2022 · 3 years ago · Source ↗
Lead and Copper Rule — MR violation
medium severityResolvedLead and Copper Rule MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2019 · 6 years ago · Source ↗
Groundwater Rule — MR violation
medium severityResolvedGroundwater Rule MR violation (Resolved).
EPA SDWIS · MR · Began Sep 1, 2018 · 7 years ago · Source ↗
Groundwater Rule — TT violation
high severityHealth-basedResolvedGroundwater Rule TT violation (Resolved).
EPA SDWIS · TT · Began Dec 1, 2016 · 9 years ago · Source ↗
Groundwater Rule — MR violation
medium severityResolvedGroundwater Rule MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2016 · 9 years ago · Source ↗
E. COLI — MR violation
medium severityResolvedE. COLI MR violation (Resolved).
EPA SDWIS · MR · Began Aug 1, 2015 · 10 years ago · Source ↗
Coliform (TCR) — MR violation
medium severityResolvedColiform (TCR) MR violation (Resolved).
EPA SDWIS · MR · Began Aug 1, 2015 · 10 years ago · Source ↗
E. COLI — MR violation
medium severityResolvedE. COLI MR violation (Resolved).
EPA SDWIS · MR · Began Jul 1, 2015 · 10 years ago · Source ↗
Coliform (TCR) — MCL violation
high severityHealth-basedResolvedColiform (TCR) MCL violation (Resolved).
EPA SDWIS · MCL · Began Dec 1, 2014 · 11 years ago · Source ↗
Coliform (TCR) — MR violation
medium severityResolvedColiform (TCR) MR violation (Resolved).
EPA SDWIS · MR · Began Apr 1, 2014 · 12 years ago · Source ↗
Public Notice — Other violation
medium severityResolvedPublic Notice Other violation (Resolved).
EPA SDWIS · Other · Began Nov 5, 2013 · 12 years ago · Source ↗
E. COLI — MR violation
medium severityResolvedE. COLI MR violation (Resolved).
EPA SDWIS · MR · Began Oct 1, 2013 · 12 years ago · Source ↗
Coliform (TCR) — MR violation
medium severityResolvedColiform (TCR) MR violation (Resolved).
EPA SDWIS · MR · Began Sep 1, 2013 · 12 years ago · Source ↗
Water-related lawsuits
No lawsuits on record.
In the news & sources
No coverage linked yet.