State Hub
Maryland Water Quality
184
Utilities in database
5.5M
Residents served
0
With open violations
74
PFAS monitored
Quick Answer
Maryland public drinking water is served by 184 EPA-tracked water systems, providing service to approximately 5.5 million residents through public utilities. No open health-based violations are currently recorded across tracked systems in the EPA federal database. 74 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 25% of MD residents use private wells, which fall outside federal utility compliance monitoring.
No open health-based violations are currently recorded in the EPA SDWIS database for Maryland's tracked water systems. Always verify with your utility's Consumer Confidence Report for annual test results.
Drinking Water in Maryland
Maryland has 184 community water systems serving approximately 5.5 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead. 25% of Maryland residents rely on private wells. MDE holds primary enforcement authority under the Safe Drinking Water Act.
Safest Large Utilities
Maryland systems with no open health violations serving 10,000+ residents.
Utilities in Maryland
151–175 of 184Cliffton on the Potomac
MD0080009 · 744 served
Town of Oxford
MD0200005 · 726 served
Port Deposit
MD0070020 · 725 served
Fairlee
MD0140003 · 725 served
Hunting Quarters
MD0180038 · 715 served
Town of Queenstown
MD0170003 · 705 served
Rolling Acres
MD0180017 · 699 served
Mount Aetna
MD0210015 · 688 served
Martingham Utilities Cooperative
MD0200004 · 675 served
Town of Chesapeake City [formerly South]
MD0070006 · 673 served
Piney Point
MD0180034 · 672 served
Town of Sharptown
MD0220005 · 625 served
Town of Millington
MD0140010 · 625 served
Town of Friendsville
MD0110004 · 622 served
St. Clements Shores
MD0180012 · 620 served
Charlotte Hall
MD1180005 · 615 served
Hunters Brooke/falcon Ridge Subd
MD0080083 · 614 served
Bridge Pointe-kent Island Village
MD0170017 · 600 served
Grasonville
MD0170020 · 600 served
Oyster Cove
MD0170011 · 600 served
Forrest Farm Subdivision
MD0180054 · 577 served
Keswick Multi-care Center
MD0300005 · 575 served
Town of Galena
MD0140004 · 560 served
Laurel Ridge
MD0180037 · 560 served
Charles County Gardens Water
MD0080008 · 551 served
Key Contaminant Concerns in Maryland
These contaminants appear most frequently in Maryland utility records or pose elevated risk in this region based on EPA data.
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing. Critically, a utility's water quality report can show zero detected lead at the treatment plant while your specific tap still delivers elevated lead — because the contamination happens inside the distribution system and your home's plumbing, not at the source.
EPA limit: 15 ppb (action level)
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
City Water Reports in Maryland
Tap water quality pages for Maryland cities — violations, PFAS records, utility profiles, and official source links.
Maryland PFAS Watchlist — all utilities with official recordsIndependent Water Testing
Find a certified lab in Maryland
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. Maryland labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Maryland
Cliffton on the Potomac
Violation history, PFAS records, and official source links
Town of Oxford
Violation history, PFAS records, and official source links
Port Deposit
Violation history, PFAS records, and official source links
PFAS monitoring records — Maryland
74 water systems in Maryland with EPA UCMR 5 records
Lead in Maryland drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Maryland drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Maryland
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About Maryland Drinking Water
Does Maryland drinking water have PFAS?
74 Maryland water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Maryland water utilities have open violations?
Browse Maryland utility compliance records and violation history
How do I test my water in Maryland?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from MD tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Maryland PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Maryland water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Maryland Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-19