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Transient Non-Community Water System · PWS MO3212445

Mariners Pier 31

Camdenton, Missouri 65020-0000 - drinking water served from groundwater sources to 100 people, tracked in EPA SDWIS and UCMR5.

100
People served
444
EPA violations
99
Health-based
Untested
UCMR5 result

The verdict

EPA records 444 drinking-water violations at Mariners Pier 31, 22% of them health-based - above the Missouri per-system average.

444
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
100
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mariners Pier 31

Mariners Pier 31 is a private-owned transient non-community water system that delivers drinking water to 100 residents in Camdenton, Missouri (Camden County) through 74 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 444 total violations for this system , of which 99 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 301 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 207 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Missouri, EPA tracks 2,823 public water systems serving 5,855,885 people, with 201,695 cumulative violations and 54,821 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 71.4 violations. Statewide, 71 of 230 UCMR5-tested systems have reported PFAS detections (30.9%).

Mariners Pier 31's 444 violations sit above the Missouri average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
100
Total Violations
444
Health-Based Violations
99
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
74
County
Camden
School/Daycare
No
MCL Violations
89
Monitoring Violations
301
Treatment Tech Violations
10

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 207 2015
Coliform (TCR) MCL 65 2015
Revised Total Coliform Rule MON 53 2024
Public Notice Other 36 2020
E. COLI MR 26 2017
Revised Total Coliform Rule MCL 24 2020
Nitrate-Nitrite MR 15 2020
Groundwater Rule TT 5 2020
Revised Total Coliform Rule TT 5 2016
Groundwater Rule Other 3 2019

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Mariners Pier 31.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MO3212445 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Missouri Drinking Water Authority

Missouri DNR, Public Drinking Water Branch is the primacy agency that licenses and inspects Mariners Pier 31 under EPA-delegated authority.

Open MO regulator portal

Source: Missouri DNR, Public Drinking Water Branch

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule MON 53 SDWIS / MO3212445 / 8000
2020 Public Notice Other 36 SDWIS / MO3212445 / 7500
2020 Revised Total Coliform Rule MCL 24 SDWIS / MO3212445 / 8000
2020 Nitrate-Nitrite MR 15 SDWIS / MO3212445 / 1038
2020 Groundwater Rule TT 5 SDWIS / MO3212445 / 0700
2019 Groundwater Rule Other 3 SDWIS / MO3212445 / 0700
2017 E. COLI MR 26 SDWIS / MO3212445 / 3014
2016 Revised Total Coliform Rule TT 5 SDWIS / MO3212445 / 8000
2015 Coliform (TCR) MR 207 SDWIS / MO3212445 / 3100
2015 Coliform (TCR) MCL 65 SDWIS / MO3212445 / 3100

How Mariners Pier 31 Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Mariners Pier 31 Missouri avg Federal benchmark
Total violations 444 71.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 99 19.4 Indicates a contaminant exceeded a federal MCL
PFAS detection None 30.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 100 2,074 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,823 regulated public water systems in Missouri.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Mariners Pier 31 water safe to drink? ▼
Mariners Pier 31 (PWS ID: MO3212445) has 444 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 100 people using Groundwater sources.
How many people does Mariners Pier 31 serve? ▼
Mariners Pier 31 serves 100 people in Camdenton, Missouri. It is a Private-owned system using Groundwater water sources with 74 service connections.
What type of violations does Mariners Pier 31 have? ▼
Mariners Pier 31 has 444 total violations: 99 health-based violations (MCL exceedances or treatment failures), 301 monitoring/reporting violations, and 10 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mariners Pier 31 water? ▼
No PFAS testing data is available for Mariners Pier 31 under the EPA's UCMR5 monitoring program.
What water source does Mariners Pier 31 use? ▼
Mariners Pier 31 uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

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

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

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