Public water system · MO3212445

Active

Mariners Pier 31

At a glance

Mariners Pier 31 (PWSID MO3212445) is an active transient non-community water system in Camden County, Missouri. It reports serving 100 people through 74 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

100

Service connections

Primary source

Groundwater

System type

TNCWS

Transient non-community water system

System record

PWSIDMO3212445

System typeTransient non-community water system

Activity statusActive

Population served100

Service connections74

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyMO state drinking water program

City served—

StateMissouri

ZIP—

CountyCamden County

How does Mariners Pier 31 compare with other water systems in Camden County?

By EPA's size categories, Mariners Pier 31 is a very small system (500 people or fewer). Camden County has 226 active public water systems. Its population served is about 60% below the county average of 250 people per system, and accounts for 0.2% of the 56,563 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Mariners Pier 31 is about 31% below that figure.

What does “transient non-community water system” mean?

A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Missouri has 1,103 active transient non-community water systems, 37% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.

Who owns and regulates Mariners Pier 31?

EPA lists Mariners Pier 31 as privately owned. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 206 of the 226 active systems in Camden County (91%) are also privately owned.

Does Mariners Pier 31 have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024. The violations listed here began between September 2019 and August 2024. By type: 5 monitoring, 4 public notice, recordkeeping or other, 1 contaminant level above the legal limit, 1 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (6 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2024-08-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-10-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A	Revised Total Coliform Rulecode 8000	Yes	Resolved
2020-08-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-07-31	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2020-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2020-04-12	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2020-01-30	Required treatment not metFailure To Address Deficiency · code 45	Groundwater Rulecode 0700	Yes	Resolved
2020-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitrate-Nitritecode 1038	No	Resolved
2019-11-02	Public notice, recordkeeping or otherFailure to Consult with State · code 20	Groundwater Rulecode 0700	No	Resolved
2019-09-27	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2019-09-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Mariners Pier 31: frequently asked questions

Who runs Mariners Pier 31?

Mariners Pier 31 (PWSID MO3212445) is a transient non-community water system privately owned. It is regulated by the MO state drinking water program.

How many people does Mariners Pier 31 serve?

Mariners Pier 31 reports serving 100 people through 74 service connections in Camden County, Missouri.

Where does Mariners Pier 31 get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does Mariners Pier 31 have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Mariners Pier 31's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024. For current results, consult EPA ECHO, or the MO state drinking water program.

Where can I find Mariners Pier 31's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Mariners Pier 31 is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Camden County

Water system	County	Population served	Type	Source
Camden County Pwsd 4 Horseshoe Bend	Camden	7,912	Community	Groundwater
Camdenton Pws	Camden	3,960	Community	Groundwater
Osage Beach Premium Outlets	Camden	3,100	Non-transient non-community	Groundwater
Osage Beach East Pws	Camden	2,611	Community	Groundwater
Big Surf Waterpark Inc.	Camden	2,500	Transient non-community	Groundwater
Camden County Pwsd #4 Shawnee Bend	Camden	2,065	Community	Groundwater

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Mariners Pier 31, PWSID MO3212445, Missouri”, https://aquacensus.com/water-systems/missouri/mariners-pier-31-mo3212445 (data as of October 1, 2026).