Knolls of Windsor
EPA ID: MD0100041 · 1,553 people served · 3 ZIP codes
ZipCheckup's reading of EPA records for Knolls of Windsor (MD0100041): no drinking-water violations recorded since 2021. Although compliance varies widely among water utilities nationally, the SDWIS file for Knolls of Windsor lists no EPA violations for this supplier, whose service area covers 1,553 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Knolls of Windsor Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Knolls of Windsor have a median household income of $179,797 and about 43,583 residents live in those ZIP codes (Census; not the number of people this system supplies).
🌊 Where Does Your Water Come From?
Knolls of Windsor's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 63th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 4 detections 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
Knolls of Windsor (EPA ID: MD0100041) is a community water system in Maryland that serves approximately 1,553 people from surface water sources.
This system provides water to 3 ZIP codes across 3 communities.
Violation History
Lead & Copper
Latest reported 90th-percentile lead result for this PWSID: Below the reporting limit (2014-12-31).
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
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: Ask your water utility whether running cold water for 2 minutes is enough to flush your plumbing before drinking.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by MD or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Knolls of Windsor (MD0100041) on EPA.gov.
Frequently Asked Questions
Is Knolls of Windsor water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Knolls of Windsor in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Knolls of Windsor serve?
Knolls of Windsor serves approximately 1,553 people across 3 ZIP codes in Maryland.
Where does Knolls of Windsor get its water?
The primary water source is surface water.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Knolls of Windsor Water Quality Report, MD. https://zipcheckup.com/water-system/md0100041/
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title = {{Knolls of Windsor Water Quality Report, MD}},
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