Potosi Pws

Community water system in Washington County, Missouri, drawing primarily on groundwater.

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

Population served

2,527

Service connections

1,236

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDMO6010659

System typeCommunity water system

Activity statusActive

Population served2,527

Service connections1,236

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMO state drinking water program

City servedPotosi

StateMissouri

ZIP—

CountyWashington County →

Violations & enforcement

Began	Violation	Contaminant	Health-based	Status
2024-04-27	75	7500	No	Resolved
2023-03-01	3A	8000	No	Resolved
2015-12-01	22	3100	Yes	Resolved
2015-09-01	22	3100	Yes	Resolved
2014-11-01	22	3100	Yes	Resolved
2013-06-01	22	3100	Yes	Resolved
2012-10-01	22	3100	Yes	Resolved
2012-08-01	22	3100	Yes	Resolved
2012-04-01	22	3100	Yes	Resolved
2011-11-10	75	7500	No	Resolved
2011-09-14	75	7500	No	Resolved
2011-09-01	22	3100	Yes	Resolved

Potosi Pws: frequently asked questions

Is Potosi Pws's water safe to drink?

Potosi Pws is an active community water system regulated under the Safe Drinking Water Act, overseen by the MO state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.

Who runs Potosi Pws?

Potosi Pws (PWSID MO6010659) is a local government-owned community water system, regulated by the MO state drinking water program.

How many people does Potosi Pws serve?

Potosi Pws reports serving 2,527 people through 1,236 service connections in Washington County, Missouri.

Where does Potosi Pws get its water?

EPA SDWIS lists this system's primary water source as groundwater.

Other water systems in Washington County

Water system	County	Population served	Type	Source
Tualatin Valley Water District	Washington	224,600	Community	Purchased surface water
Fayetteville Waterworks	Washington	116,398	Community	Purchased surface water
St George City Water System	Washington	105,240	Community	Purchased surface water
Johnson City Water Dept	Washington	105,057	Community	Surface water
Springdale Water Utilities	Washington	98,948	Community	Purchased surface water
Hillsboro, City of	Washington	92,632	Community	Purchased surface water