Greenbrier
EPA ID: MD0180045 · 1,161 people served · 3 ZIP codes
Zero violations in five consecutive years of EPA monitoring — Greenbrier has held a clean track record across every reporting cycle in that span, with no enforcement activity of any kind on file for the full service population of 1,161 residents.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Greenbrier Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Greenbrier serves a community with a median household income of $106,386 and an estimated 41,640 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?
Greenbrier'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 St. Mary's 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
Greenbrier (EPA ID: MD0180045) is a community water system in Maryland that serves approximately 1,161 people from groundwater sources.
This system provides water to 3 ZIP codes across 3 communities.
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
Coverage: 2 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Greenbrier (MD0180045) on EPA.gov.
Frequently Asked Questions
Is Greenbrier water safe to drink?
Based on EPA records, Greenbrier has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Greenbrier serve?
Greenbrier serves approximately 1,161 people across 3 ZIP codes in Maryland.
Where does Greenbrier get its water?
The primary water source is groundwater.