Gramercy Llc (aka Koinonia Partnership )
EPA ID: MD0030023 · 40 people served · 2 ZIP codes
Gramercy Llc (aka Koinonia Partnership )'s five-year compliance history is clean by every EPA metric — no health-based violations, no monitoring lapses, no enforcement actions on record, reflecting consistent performance for a utility that supplies water to approximately 40 residents year after year.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 88% chance of violation in next 12 months
Violations went from 2 (2022) to 2 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Gramercy Llc (aka Koinonia Partnership ) Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Gramercy Llc (aka Koinonia Partnership ) serves a community with a median household income of $142,789 and an estimated 61,856 residents across its service area. Approximately 47% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Gramercy Llc (aka Koinonia Partnership )'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 Baltimore 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
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 1 detection recorded.
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
GRAMERCY LLC (AKA KOINONIA PARTNERSHIP ) (EPA ID: MD0030023) is a community water system in Maryland that serves approximately 40 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 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
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Gramercy Llc (aka Koinonia Partnership ) (MD0030023) on EPA.gov.
Frequently Asked Questions
Is Gramercy Llc (aka Koinonia Partnership ) water safe to drink?
Based on EPA records, Gramercy Llc (aka Koinonia Partnership ) has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Gramercy Llc (aka Koinonia Partnership ) serve?
Gramercy Llc (aka Koinonia Partnership ) serves approximately 40 people across 2 ZIP codes in Maryland.
Where does Gramercy Llc (aka Koinonia Partnership ) get its water?
The primary water source is groundwater.