Water Quality in Upper Marlboro, MD: No Violations — Grade D
Grade D · Score 53/100 · 2 water systems · Updated 2026-05-03
Upper Marlboro's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Not one violation appears in MD's EPA file for Upper Marlboro — 2 monitored systems, all clear.
Water Quality Map: Upper Marlboro, MD
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Upper Marlboro
Water quality varies across Upper Marlboro's 5 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 20772 | D | 50 | 0 | 0 | View report → |
| 20773 | D | 53 | 0 | 0 | View report → |
| 20775 | D | 53 | 0 | 0 | View report → |
| 20792 | D | 53 | 0 | 0 | View report → |
| 20774 | C | 55 | 0 | 0 | View report → |
Water Quality Overview
Upper Marlboro, Maryland receives a water quality grade of D with an overall score of 53 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
No EPA violations have been recorded for the 2 water systems serving Upper Marlboro. This is a positive indicator, though it does not guarantee the absence of all contaminants — some substances (like PFAS) are not yet fully regulated.
What Grade D Means
A grade of D indicates significant compliance issues. Upper Marlboro's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
Lead testing data for Upper Marlboro is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
Radon Risk
Upper Marlboro is in EPA Radon Zone 2 (Moderate risk). Testing is recommended, especially for homes with basements or ground-level living spaces.
Water Systems Serving Upper Marlboro
Upper Marlboro is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 25,810 people across 5 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
How to Check Your Water in Upper Marlboro
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Upper Marlboro vs. Nearby Maryland Cities
How Upper Marlboro's water quality compares to similar cities in Maryland:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Upper Marlboro | D | 0 | 2 | 25,810 |
| College Park | D | 0 | 2 | 26,248 |
| Hyattsville | D | 0 | 2 | 26,248 |
| Riverdale | D | 0 | 2 | 26,248 |
Water Quality by ZIP Code in Upper Marlboro
Water quality varies across Upper Marlboro's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 20772 | 50 | D | 0 | 0 |
| 20773 | 53 | D | 0 | 0 |
| 20775 | 53 | D | 0 | 0 |
| 20792 | 53 | D | 0 | 0 |
| 20774 | 55 | C | 0 | 0 |
Common Questions About Upper Marlboro Water
These are the most common questions residents search for about water quality in Upper Marlboro, Maryland:
Is Upper Marlboro water hard or soft? Water hardness varies by source. Upper Marlboro's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Upper Marlboro tap water? Upper Marlboro's water receives a grade of D (53/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Upper Marlboro? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Upper Marlboro vs. Maryland Average
Understanding how Upper Marlboro compares to the broader Maryland average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Upper Marlboro.
ZIP Codes in Upper Marlboro
Upper Marlboro spans 5 ZIP codes. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.