Granite Mobile Home Park
EPA ID: MD0030204 · 96 people served · 33 ZIP codes
Although compliance varies widely among water utilities nationally, Granite Mobile Home Park stands out with zero EPA violations over five consecutive monitoring years, delivering safe tap water to 96 residents and showing no enforcement activity across the entire reporting span.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Granite Mobile Home Park Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Granite Mobile Home Park serves a community with a median household income of $149,055 and an estimated 453,284 residents across its service area. Approximately 61% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Granite Mobile Home Park'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 Montgomery County, Maryland rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 46 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
Granite Mobile Home Park (EPA ID: MD0030204) is a community water system in Maryland that serves approximately 96 people from groundwater sources.
This system provides water to 33 ZIP codes across 12 communities.
Average Home Safety Score: D (51/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 20810 | 0.0044 mg/L | No | N/A |
| 20811 | 0.0044 mg/L | No | N/A |
| 20813 | 0.0044 mg/L | No | N/A |
| 20824 | 0.0044 mg/L | No | N/A |
| 20827 | 0.0044 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
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
This system serves 33 ZIP codes:
20810 · 20811 · 20812 · 20813 · 20814 20815 · 20816 · 20817 · 20818 · 20824 20825 · 20827 · 20848 · 20852 · 20855 20874 · 20875 · 20876 · 20877 · 20878 20879 · 20880 · 20882 · 20884 · 20885 20886 · 20889 · 20892 · 20894 · 20896 20897 · 20898 · 20899
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Granite Mobile Home Park (MD0030204) on EPA.gov.
Frequently Asked Questions
Is Granite Mobile Home Park water safe to drink?
Based on EPA records, Granite Mobile Home Park has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does Granite Mobile Home Park serve?
Granite Mobile Home Park serves approximately 96 people across 33 ZIP codes in Maryland.
Where does Granite Mobile Home Park get its water?
The primary water source is groundwater.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: GRANITE MOBILE HOME PARK Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment classification and chemical list sourced from GRANITE MOBILE HOME PARK Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Granite Mobile Home Park (EPA ID: MD0030204) — request the latest Consumer Confidence Report or ask about specific contaminants.