Nitrate violations in Maryland
173 active public water systems in Maryland had a Nitrate violation in the past three years, 14 of them in the latest quarter of EPA's data. What Nitrate is and why it matters.
Systems with a Nitrate violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Dollar General #13896 Cecil County |
450 | 1 | 0 | |
|
Dollar General #14009 Cecil County |
300 | 2 | 0 | |
|
Fahrney-Keedy Senior Living Community Washington County |
250 | 3 | 0 | |
|
Jarrettsville Pharmacy Harford County |
214 | 1 | 0 | |
|
Christian Child Care Center of Whiteford Harford County |
200 | 3 | 1 | |
|
Forest Hill Nature Preschool & Childcare Harford County |
150 | 2 | 0 | |
|
ST Pauls Lutheran Church and School Baltimore County |
150 | 3 | 0 | |
|
Concourse Commercial Condo, Inc. Anne Arundel County |
100 | 3 | 0 | |
|
I-70 Auto Mall Washington County |
85 | 2 | 0 | |
|
Cedar Grove Beer and Wine Montgomery County |
80 | 1 | 0 | |
|
Beckleys Camping Center Frederick County |
45 | 2 | 0 | |
|
The Village Inn Wicomico County |
40 | 2 | 0 | |
|
Neutron Products, Inc. Montgomery County |
35 | 3 | 0 | |
|
Route One Diner Cecil County |
25 | 1 | 0 | |
|
City of Baltimore Baltimore city County |
1,600,000 | 3 | 0 | |
|
Lexington Park St. Mary's County |
43,030 | 3 | 0 | |
|
Midland-Lonaconing Allegany County |
5,000 | 4 | 0 | |
|
Town of Chesapeake Beach Calvert County |
5,000 | 1 | 0 | |
|
City of Pocomoke City Worcester County |
4,100 | 2 | 0 | |
|
Fallston High School Harford County |
1,113 | 1 | 0 | |
|
Town of Willards Wicomico County |
1,021 | 3 | 0 | |
|
Glenelg Country School Howard County |
950 | 3 | 0 | |
|
St. John the Evangelist Catholic School Baltimore County |
730 | 4 | 0 | |
|
Town of Queenstown Queen Anne's County |
705 | 4 | 0 | |
|
Town of Millington Kent County |
630 | 2 | 0 | |
|
Elk Neck Elementary Cecil County |
605 | 1 | 0 | |
|
North Bend Elementary School Harford County |
534 | 3 | 0 | |
|
Jarrettsville Elementary Harford County |
528 | 2 | 0 | |
|
Hereford Plaza (michaels Pizza, 7-11) Baltimore County |
520 | 1 | 0 | |
|
Bryantown Mall Charles County |
512 | 2 | 0 | |
|
Town of Cecilton Cecil County |
477 | 2 | 1 | |
|
Huntingtown Professional Center, LLC Calvert County |
470 | 2 | 0 | |
|
The Calverton School Calvert County |
461 | 3 | 0 | |
|
Benjamins Village/homestead M.h.p. Cecil County |
400 | 2 | 0 | |
|
Smokey Glen Farm Picnic Pavillion Montgomery County |
400 | 1 | 0 | |
|
Caroline Acres Mobile Home Park Caroline County |
395 | 4 | 0 | |
|
Calvert Elementary Cecil County |
389 | 1 | 0 | |
|
Glenwood Community Center Howard County |
366 | 2 | 0 | |
|
Paradise Mennonite School Washington County |
355 | 1 | 0 | |
|
St. Stephen School Baltimore County |
350 | 3 | 0 | |
|
Tri-State Christian Academy Cecil County |
350 | 3 | 0 | |
|
Kfc Odenton Anne Arundel County |
320 | 2 | 0 | |
|
Lankford Bay Marina Store Kent County |
320 | 2 | 0 | |
|
Elks Lodge 2474 Kent County |
300 | 2 | 0 | |
|
Grace Bible Chapel Cecil County |
300 | 1 | 0 | |
|
Frederick Baptist Church & School Frederick County |
267 | 2 | 1 | |
|
Acappella Italian Restaurant Harford County |
265 | 2 | 0 | |
|
Bank Shot Bar and Grill Anne Arundel County |
262 | 1 | 0 | |
|
Dollar General #21089 Washington County |
257 | 1 | 0 | |
|
Comus Inn Montgomery County |
256 | 2 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Nitrate, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Nitrate alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Maryland records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.