Maryland Water Quality Reports

Comprehensive water quality data for 225 cities across Maryland. View EPA-verified contaminant levels and get filter recommendations.

225

Cities

13

Safe

66

Monitor

3

At Risk

5

Limited testing

138

No Test Data

→ Search by ZIP code instead

Maryland water quality ranking EPA-certified testing labs Water utilities in Maryland

Water Quality by County

Explore aggregated water quality scores across Maryland counties. Scores are calculated based on EPA data and weighted by population.

Loading map...

Data from 82 cities serving 3,294,477 people across 22 counties.

Common Contaminants in Maryland

39 cities in Maryland have at least one contaminant above EPA health guidelines.

Arsenic(17 cities)Radium, combined (-226 & -228)(16 cities)Gross Alpha (Excl. Radon and Uranium)(12 cities)Perfluorooctanesulfonic acid(8 cities)Perfluorooctanoic acid(7 cities)Tetrachloroethylene(2 cities)

Worried about Arsenic in your water?

Upload your water test (PDF or a photo) and we'll email a plain-English reading of your Arsenic result — and every other number — free. Educational only, no medical claims.

Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.

Cities in Maryland

Takoma Park

People Served1900K

93 results on file

Above Guidelines0

View Report →

Baltimore

People Served1600K

37 results on file

Above Guidelines4

View Report →

Severna Park

People Served291K

87 results on file

Above Guidelines2

View Report →

Columbia

People Served286K

27 results on file

Above Guidelines0

View Report →

Abingdon

People Served105K

20 contaminants listed, record not matched to an EPA water system

Above Guidelines0

View Report →

Bel Air South

People Served105K

88 results on file

Above Guidelines2

View Report →

Bel Air

People Served105K

88 results on file

Above Guidelines2

View Report →

Funkstown

People Served92K

85 results on file

Above Guidelines0

View Report →

Hagerstown

People Served92K

85 results on file

Above Guidelines0

View Report →

Odenton

People Served63K

60 results on file

Above Guidelines0

View Report →

Frederick

People Served54K

87 results on file

Above Guidelines0

View Report →

Rockville

People Served52K

86 results on file

Above Guidelines0

View Report →

Urbana

People Served49K

87 results on file

Above Guidelines0

View Report →

Lexington Park

People Served43K

86 results on file

Above Guidelines1

View Report →

Westminster

People Served35K

23 results on file

Above Guidelines2

View Report →

Salisbury

People Served30K

85 results on file

Above Guidelines2

View Report →

Ocean City

People Served30K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Cumberland

People Served27K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Bowie

People Served25K

38 results on file

Above Guidelines0

View Report →

Fairwood

People Served25K

38 results on file

Above Guidelines0

View Report →

Eldersburg

People Served25K

86 results on file

Above Guidelines2

View Report →

Sykesville

People Served25K

86 results on file

Above Guidelines2

View Report →

Aberdeen

People Served16K

82 results on file

Above Guidelines2

View Report →

Easton

People Served16K

85 results on file

Above Guidelines1

View Report →

Elkton

People Served16K

88 results on file

Above Guidelines4

View Report →

Algonquin

People Served15K

86 results on file

Above Guidelines1

View Report →

Cambridge

People Served15K

86 results on file

Above Guidelines1

View Report →

Havre de Grace

People Served14K

86 results on file

Above Guidelines0

View Report →

Ocean Pines

People Served12K

85 results on file

Above Guidelines0

View Report →

Mount Airy

People Served10K

86 results on file

Above Guidelines2

View Report →

Chesapeake Ranch Estates

People Served10K

85 results on file

Above Guidelines1

View Report →

La Plata

People Served10K

86 results on file

Above Guidelines2

View Report →

Lusby

People Served10K

85 results on file

Above Guidelines1

View Report →

North East

People Served9K

86 results on file

Above Guidelines0

View Report →

Walkersville

People Served8K

83 results on file

Above Guidelines1

View Report →

Brunswick

People Served7K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Fruitland

People Served6K

60 results on file

Above Guidelines1

View Report →

Severn

People Served5K

61 results on file

Above Guidelines1

View Report →

Chestertown

People Served5K

82 results on file

Above Guidelines1

View Report →

Poolesville

People Served5K

87 results on file

Above Guidelines4

View Report →

Chesapeake Beach

People Served5K

85 results on file

Above Guidelines0

View Report →

Berlin

People Served5K

86 results on file

Above Guidelines2

View Report →

Delmar

People Served5K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Denton

People Served5K

23 contaminants listed, only PFAS results from EPA's UCMR 5 on file

Above Guidelines0

View Report →

Perryville

People Served4K

85 results on file

Above Guidelines0

View Report →

Pocomoke City

People Served4K

61 results on file

Above Guidelines0

View Report →

Prince Frederick

People Served4K

60 results on file

Above Guidelines2

View Report →

Solomons

People Served4K

60 results on file

Above Guidelines2

View Report →

Charlestown

People Served4K

35 results on file

Above Guidelines0

View Report →

Snow Hill

People Served4K

4 results on file

Above Guidelines0

View Report →

Centreville

People Served3K

84 results on file

Above Guidelines1

View Report →

Princess Anne

People Served3K

90 results on file

Above Guidelines0

View Report →

Wildewood

People Served3K

60 results on file

Above Guidelines1

View Report →

Mountain Lake Park

People Served3K

36 results on file

Above Guidelines1

View Report →

North Beach

People Served3K

59 results on file

Above Guidelines0

View Report →

Leonardtown

People Served3K

14 results on file

Above Guidelines0

View Report →

St. Michaels

People Served3K

59 results on file

Above Guidelines1

View Report →

Smithsburg

People Served3K

4 contaminants listed, record not matched to an EPA water system

Above Guidelines0

View Report →

Federalsburg

People Served2K

3 results on file

Above Guidelines0

View Report →

Emmitsburg

People Served2K

4 results on file

Above Guidelines0

View Report →

Halfway

People Served2K

3 results on file

Above Guidelines0

View Report →

Williamsport

People Served2K

3 results on file

Above Guidelines0

View Report →

Herald Harbor

People Served2K

17 results on file

Above Guidelines0

View Report →

Westernport

People Served2K

4 results on file

Above Guidelines0

View Report →

Hurlock

People Served2K

43 results on file

Above Guidelines0

View Report →

Hancock

People Served2K

29 results on file

Above Guidelines3

View Report →

Greensboro

People Served2K

62 results on file

Above Guidelines0

View Report →

Oakland

People Served2K

No contaminant results on file

Above Guidelines0

View Report →

Long Beach

People Served2K

62 results on file

Above Guidelines1

View Report →

Rock Hall

People Served2K

3 results on file

Above Guidelines0

View Report →

Ridgely

People Served2K

3 results on file

Above Guidelines0

View Report →

Myersville

People Served2K

5 results on file

Above Guidelines0

View Report →

Pittsville

People Served2K

14 results on file

Above Guidelines0

View Report →

Sherwood Forest

People Served1K

3 results on file

Above Guidelines0

View Report →

Trappe

People Served1K

16 results on file

Above Guidelines0

View Report →

New Windsor

People Served1K

61 results on file

Above Guidelines2

View Report →

Hebron

People Served1K

3 results on file

Above Guidelines0

View Report →

Willards

People Served1K

37 results on file

Above Guidelines0

View Report →

Oxford

People Served1K

14 results on file

Above Guidelines1

View Report →

Queenstown

People Served1K

62 results on file

Above Guidelines1

View Report →

Preston

People Served1K

14 results on file

Above Guidelines1

View Report →

Mount Aetna

People Served1K

61 results on file

Above Guidelines0

View Report →

Grasonville

People Served1K

30 results on file

Above Guidelines0

View Report →

Secretary

People Served1K

16 results on file

Above Guidelines1

View Report →

East New Market

People Served0K

61 results on file

Above Guidelines0

View Report →

Kitzmiller

People Served0K

35 results on file

Above Guidelines0

View Report →

St. Leonard

People Served0K

14 results on file

Above Guidelines1

View Report →

Accident

People Served0K

60 results on file

Above Guidelines1

View Report →

Deer Park

People Served0K

30 results on file

Above Guidelines0

View Report →

Aberdeen Proving Ground

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Adelphi

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Ashton-Sandy Spring

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Aspen Hill

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Beltsville

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Berwyn Heights

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Bethesda

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Bishopville

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Bladensburg

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Brentwood

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Brookeville

People Served0K

No contaminant results on file

Above Guidelines0

View Report →

Showing top 100 of 225 cities by population.

Use the search box above to find any city in Maryland.

Get the Weekly Water Brief

One email a week on water testing, treatment, and what water-quality data means for your home.

One email a week. Unsubscribe anytime.