Maryland

Water quality data from the EPA Safe Drinking Water Information System

Lead Risk: Caution

Water Systems

7,992

Active public water systems

Population Served

6.03M

Residents with piped water

Lead Violations

Systems exceeding 15 ppb

Copper Violations

305

Lead & Copper Rule

Average Lead Level

2.89 ppb

EPA Action Level: 15 ppb

MCLG (health goal): 0 ppb

0 ppbAction Level: 15 ppb

Average across 1199 systems with reported lead data.

Violations Detected

361 water systems in Maryland have reported violations under the Lead and Copper Rule. These utilities are required to notify customers and take corrective action.

56 lead violations305 copper violations

Water Systems: Highest Lead Levels

System Name	City	Population	Lead Level	Status	Sample Date
CITY OF CAMBRIDGE WATER	CAMBRIDGE	15,000	4.10 ppb	OK	2023-12-31
OCEAN PINES	BERLIN	11,890	3.30 ppb	OK	2023-12-31
HOWARD COUNTY D.P.W. DISTRIBUTION	COLUMBIA	286,158	3.00 ppb	OK	2020-12-31
NEW DESIGN - FREDERICK COUNTY	FREDERICK	74,911	3.00 ppb	OK	2019-12-31
TOWN OF OCEAN CITY	OCEAN CITY	30,000	2.80 ppb	OK	2024-12-31
CITY OF BALTIMORE	BALTIMORE	1,600,000	2.74 ppb	OK	2024-12-31
CITY OF WESTMINSTER	WESTMINSTER	35,256	2.40 ppb	OK	2018-12-31
EASTON UTILITIES	EASTON	17,357	2.10 ppb	OK	2023-12-31
CITY OF HAVRE DE GRACE	HAVRE DE GRACE	14,000	2.00 ppb	OK	2025-12-31
CITY OF FREDERICK	FREDERICK	54,000	1.10 ppb	OK	2021-12-31
CITY OF CUMBERLAND	CUMBERLAND	27,039	1.00 ppb	OK	2023-12-31
CITY OF HAGERSTOWN	HAGERSTOWN	92,200	0.80 ppb	OK	2025-12-31
WASHINGTON SUBURBAN SANITARY COMMISSION	LAUREL	1,900,000	0.00 ppb	OK	2020-12-31
GLEN BURNIE-BROADNECK	MILLERSVILLE	290,606	0.00 ppb	OK	2018-12-31
HARFORD COUNTY D.P.W.	ABINGDON	104,567	0.00 ppb	OK	2023-12-31

Showing top 15 of 1131 systems with lead data. Action level: 15 ppb.

Systems With Active Violations

These water systems have exceeded EPA limits and must take corrective action.

CITY OF CUMBERLAND

CUMBERLAND · Pop. 27,039

Copper

Lead: 1.00 ppb (2023-12-31)

Water Source Types

Groundwater7417 (95%)

Surface Water135 (2%)

Purchased Surface Water124 (2%)

Groundwater Under Influence of SW61 (1%)

Unknown45 (1%)

Purchased Groundwater16 (0%)

Resources

EPA Water Data Reports

Official drinking water data and reports

Lead in Drinking Water

EPA guidance on lead risks and remediation

Learn About Lead Contamination

Health effects, filtering options, and more

Air Quality

Good

Avg AQI

44.8

PM2.5

6.2 µg/m³

Unhealthy Days

Primary Pollutant

Ozone

AQI 0 (Good)AQI 100 (Moderate)200+

Source: EPA AirNow & American Lung Association 2024 State of the Air. AQI scale: 0–50 Good · 51–100 Moderate · 101–150 Sensitive Groups · 151+ Unhealthy.

PFAS Contamination

Moderate Detection

PFAS (per- and polyfluoroalkyl substances), known as “forever chemicals,” are a group of synthetic chemicals that persist indefinitely in the environment and human body. The EPA set a maximum contaminant level (MCL) of 4 parts per trillion (ppt) for PFOA and PFOS in April 2024. View national PFAS tracker →

Systems Tested

198

PFAS Detected

Detection Rate

36.4%

Exceeding MCL (4 ppt)

12(6.1%)

0%Detection rate: 36.4%100%

Highest recorded level: 28 ppt (EPA MCL: 4 ppt). Military bases and industrial sites; Chesapeake Bay watershed affected

Data source:EPA Safe Drinking Water Information System (SDWIS), Lead and Copper Rule monitoring data. Lead levels represent 90th percentile results from the most recent monitoring period. Violations indicate exceedances of EPA action levels requiring corrective action. This tool is for informational purposes only and does not replace your utility's official Consumer Confidence Report.