Cliffton on the Potomac
EPA ID: MD0080009 · 744 people served · 1 ZIP code
Five years of EPA monitoring have produced no violations for Cliffton on the Potomac — the supplier serving 744 residents has kept every contaminant level within federal limits, a result that places it among the top-performing utilities for systems with a service population of comparable size.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Cliffton on the Potomac Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Cliffton on the Potomac serves a community with a median household income of $130,008 and an estimated 21,601 residents across its service area. Approximately 41% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Cliffton on the Potomac's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in Charles County, Maryland rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Comparable Water Systems
Similar-sized systems in Maryland
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Cliffton on the Potomac (EPA ID: MD0080009) is a community water system in Maryland that serves approximately 744 people from groundwater sources.
This system serves ZIP code 20646 in La Plata.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
- 20646 — La Plata
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Cliffton on the Potomac (MD0080009) on EPA.gov.
Frequently Asked Questions
Is Cliffton on the Potomac water safe to drink?
Based on EPA records, Cliffton on the Potomac has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Cliffton on the Potomac serve?
Cliffton on the Potomac serves approximately 744 people across 1 ZIP code in Maryland.
Where does Cliffton on the Potomac get its water?
The primary water source is groundwater.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.