Harford County, Maryland — public water systems
At a glance
226 active public water systems are filed under Harford County, Maryland in EPA's SDWIS records, together reporting 215,993 people served. The largest is Harford County D.P.W., which reports serving 104,567 people. 15 are community water systems serving people where they live; the other 211 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
226
Population served
216K
Community systems
15
Groundwater share
97.8%
How does Harford County compare with other Maryland counties?
Harford County has the 3rd-most active public water systems among the 60 counties listed for active Maryland systems in EPA records; among the 27 with 3 or more systems, the median has 78. Its systems report 215,993 people served in total, the 5th-largest county figure in the state and 3.7% of the statewide total. The average system here reports serving 956 people, about half of the Maryland average of 1,947. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Harford County's drinking water come from?
By primary water source, Harford County's active systems draw on groundwater (221, 98%), surface water (3, 1.3%) and purchased surface water (2, 0.9%). Overall, 98% rely mainly on groundwater (including purchased groundwater) and 2.2% on surface water, compared with 97% and 2.6% across Maryland. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Harford County D.P.W., draws primarily on surface water.
What kinds of water systems operate in Harford County?
Harford County's active systems break down as 15 community systems (6.6%), 46 non-transient non-community systems (20%) and 165 transient non-community systems (73%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (78%), local government (20%) and state government (2.2%).
The 50 largest water systems in Harford County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Harford County D.P.W. | Harford | 104,567 | Community | Surface water |
| 2 | City of Aberdeen | Harford | 18,006 | Community | Purchased surface water |
| 3 | Chapel Hill - Aberdeen Proving Grounds | Harford | 15,000 | Community | Groundwater |
| 4 | City of Havre De Grace | Harford | 14,000 | Community | Surface water |
| 5 | Maryland American Water Company | Harford | 13,200 | Community | Surface water |
| 6 | Harford Community College - Main Campus | Harford | 2,500 | Non-transient non-community | Groundwater |
| 7 | Greenridge Subdivision | Harford | 2,271 | Community | Purchased surface water |
| 8 | Mountain Christian Church | Harford | 2,120 | Transient non-community | Groundwater |
| 9 | Wawa Foods #559 | Harford | 1,823 | Transient non-community | Groundwater |
| 10 | North Harford High School | Harford | 1,346 | Non-transient non-community | Groundwater |
| 11 | Schucks Corner Sheetz | Harford | 1,233 | Transient non-community | Groundwater |
| 12 | Mcdonalds | Harford | 1,230 | Transient non-community | Groundwater |
| 13 | Harford Technical High School | Harford | 1,187 | Non-transient non-community | Groundwater |
| 14 | Youths Benefit Elementary School | Harford | 1,175 | Non-transient non-community | Groundwater |
| 15 | Fallston High School | Harford | 1,113 | Non-transient non-community | Groundwater |
| 16 | North Harford Middle School | Harford | 1,084 | Non-transient non-community | Groundwater |
| 17 | Fallston Middle School | Harford | 1,041 | Non-transient non-community | Groundwater |
| 18 | Seven-Eleven #22281 | Harford | 908 | Transient non-community | Groundwater |
| 19 | Royal Farm Store #1 | Harford | 812 | Transient non-community | Groundwater |
| 20 | Savory Deli and Market | Harford | 714 | Transient non-community | Groundwater |
| 21 | Harford Community College | Harford | 713 | Non-transient non-community | Groundwater |
| 22 | Prospect Mill Elementary | Harford | 691 | Non-transient non-community | Groundwater |
| 23 | Forest Hill Elementary School | Harford | 637 | Non-transient non-community | Groundwater |
| 24 | Fallston Library | Harford | 610 | Transient non-community | Groundwater |
| 25 | Highs #1 - Whiteford | Harford | 605 | Transient non-community | Groundwater |
| 26 | North Bend Elementary School | Harford | 534 | Non-transient non-community | Groundwater |
| 27 | St. Marks Church - Multipurpose | Harford | 503 | Transient non-community | Groundwater |
| 28 | Harford Christian School | Harford | 500 | Non-transient non-community | Groundwater |
| 29 | Swan Harbour Dell Mobile Home Park | Harford | 500 | Community | Groundwater |
| 30 | North Harford Elementary | Harford | 464 | Non-transient non-community | Groundwater |
| 31 | Jarrettsville Elementary | Harford | 445 | Non-transient non-community | Groundwater |
| 32 | Churchville Elementary School | Harford | 441 | Non-transient non-community | Groundwater |
| 33 | Edgeley Grove Park - Annies Play Ground | Harford | 400 | Transient non-community | Groundwater |
| 34 | Royal Farm Store #95 | Harford | 400 | Transient non-community | Groundwater |
| 35 | Valley Brook Swim Club | Harford | 400 | Transient non-community | Groundwater |
| 36 | Jarrettsville Plaza Shopping Center | Harford | 383 | Transient non-community | Groundwater |
| 37 | Tiffanee & Co Bakery/Goodwill | Harford | 354 | Transient non-community | Groundwater |
| 38 | Village Square Shopping Center | Harford | 315 | Transient non-community | Groundwater |
| 39 | Arctic Circle Drive-in | Harford | 310 | Transient non-community | Groundwater |
| 40 | Dublin Elementary School | Harford | 308 | Non-transient non-community | Groundwater |
| 41 | Walgreens #19144 | Harford | 304 | Transient non-community | Groundwater |
| 42 | Broadcreek Camp Saffran | Harford | 302 | Transient non-community | Groundwater |
| 43 | Hickory Recreation Center | Harford | 300 | Transient non-community | Groundwater |
| 44 | Forest Hill Recreation Center Well 2 | Harford | 300 | Transient non-community | Groundwater |
| 45 | Grace Assembly of God | Harford | 300 | Transient non-community | Groundwater |
| 46 | Forest Hill Recreation Center Well 1 | Harford | 300 | Transient non-community | Groundwater |
| 47 | Harford Academy | Harford | 292 | Non-transient non-community | Groundwater |
| 48 | Churchville Rec Center Main Bldg | Harford | 280 | Transient non-community | Groundwater |
| 49 | Penn Mar Plaza and Buon Gusto | Harford | 275 | Transient non-community | Groundwater |
| 50 | Dunkin Donuts Jarrettsville | Harford | 275 | Transient non-community | Groundwater |
All other water systems in Harford County (176)
The remaining active systems filed under Harford County, largest first, with the population each reports serving.
- Whiteford Library267
- Acappella Italian Restaurant265
- Brooms Bloom Dairy259
- Herbs on the Curb257
- Highs # 81255
- Campus Hills Water Works250
- Riverside Community Church250
- Norrisville Elementary School231
- Fallston Volunteer Fire Co.220
- Lakeside Vista219
- Jds Smokehouse North214
- Jarrettsville Pharmacy214
- Smith'S Hardware212
- Salem Lutheran Children'S Center210
- Tacos Tolteca208
- Highs # 2208
- Highs #68204
- Madonna Dollar General203
- Highs # 130203
- The Church of Christ (4th Watch)201
- Fallston Rec Center(Senior Activity Cen200
- Christian Child Care Center of Whiteford200
- Churchville Rec Center -Glenville Bldg200
- Lighthouse Church195
- Madonna House Shopping Center173
- Hickory Child Development,Nazarene Churc172
- Jarrettsville Creamery170
- St Marys Catholic Church167
- Highland Community Asc./Child. Cntr. N.165
- Black Forest Tap House165
- Rocks State Park - Hills Picinic Grove162
- Dublin Market157
- Highs #34156
- Fallston Shopping Center156
- Stonewall Day Care Center #2155
- Highs #86154
- Swan Harbor Farm153
- Fellowship Chapel153
- North Harford Baptist Church152
- Slate Farm - Whiteford152
- Jarrettsville Fire Co151
- Fallston Swim Club150
- Broadcreek Camp Oest150
- Camp Habonim Moshava150
- Churchville Rec Center-Level Road150
- Harford Center Inc..150
- Church of Latter Day Saints150
- Forest Hill Nature Preschool & Childcare150
- Harford County 4-H Camp Dining Hall142
- Rocks State Park - Rock Ridge Area141
- Subway Jarrettsville133
- Pond View Farm130
- Broadcreek Camp Spencer130
- Ladew Topiary Gardens129
- Bel Air Golf Center126
- The Highlands School125
- Camp Ramblewood Pool125
- Fallston Recreation Complex122
- Iglesia De Dias Puerta Del Cielo120
- Cornerstone Community Church of Joppa120
- Childtime of Churchville/Aberdeen115
- Camp Hidden Valley115
- Bel Air Kingdom Hall112
- Level Vol Fire Co110
- Churchville Presby.Church & Day Care110
- Genes Bar and Restaurant110
- Ball Park Restaurant108
- Geneva Farms Golf Course106
- Camp Wo Me To Main Office105
- Falling Branch Brewery105
- Keyes Creamery104
- Unitarian Universalist Fellowship103
- Gunpowder Falls St Pk Jerusalem Mill103
- Norrisville Library and Rec Center103
- Fawn Grove Church of the Nazarene103
- Jarrettsville Carroll Fuel102
- Grandview Christian Church101
- Fallston Rec. Center - Concession Stand100
- Camp Ramblewood Dining Hall100
- Whitaker Mill Andharford Gymnastics100
- Masjid Ibrahim - Harford Islamic Center100
- Friends Park Restroom, Storage Bldg.100
- J'S Farm Market100
- Jarrettsville Elem. Rec Center100
- R & R Estates96
- Conowingo Hydroelectric Station90
- Jarrettsville Veterinary Center89
- Highland Presbyterian Church87
- Hopkins Farm Brewery87
- Fallston Child Care Center87
- Eats & Sweets86
- Winters Run Golf Course85
- Harford Jewish Center82
- Andy Wargos Restaurant80
- Oak Grove Baptist Church80
- Norrisville Um Church80
- Glen Echo MHP, Mr. Ys Pizza78
- Victorious Faith Fellowship Church77
- Tabernacle Baptist Church77
- Cornerstone Baptist Church76
- Camp Ramblewood Boys Cabins75
- Reckord Road Park75
- Camp Ramblewood Girls Cabins75
- North Harford Swim Club75
- Royal Farms #8875
- Clarks United Methodist Church75
- Havre De Grace Quarry75
- Susquehanna State Park (Picnic Area)75
- Whiteford American Legion #18272
- Harford County 4-H Girls Cabin71
- Harford County 4-H Camp(New Dining Hall71
- Fallston Building70
- Emory Um Church70
- Monarch Montessori School68
- Bethel Presbyterian Church67
- Union Chapel United Methodist Church61
- Holy Trinity Episcopal Church61
- Centre Umc and Forest Hill Nursery60
- Smiths Chapel Umc60
- Mt Carmel Baptist Church60
- Tabernacle of Faith60
- J.F.K. Maintenance Facility #160
- Queens Castle Mobile Home Park60
- Franklin Baptist Church56
- Ebenezer Um Church55
- Saubels Market55
- Fountain Green Mobile Home Park55
- Holy Cross Episcopal Church55
- Fallston Liquors Strip Mall55
- Hickory Business Center53
- Webster United Church of Christ52
- Grace Memorial Episcopal Church50
- Jarrettsville Vfw #867250
- Fair Meadows50
- Jarrettsville United Methodist Church50
- Harford Technical Hs Concession Stnd50
- Camp Indian Lake Dining Hall Well 4 - 650
- Wilna 7th Day Adventist Church50
- Camp Indian Lake Christian Service Camp50
- Harford County Airport50
- Trinity Freewill Baptist Church45
- Sod Run Wastewater Treatment Plant45
- Fast Eddies Pit Beef44
- Fairview A.M.E. Church43
- William Watters Umc41
- Fallston Presbyterian Church41
- Christ Episcopal Church41
- Darlington Library41
- Bethel Day Care and School40
- Harford County Ag Center40
- St James Uame Church40
- Mountain Branch Golf Course Clubhouse40
- Northern Police Precinct & Library38
- Tlc Preschool and Daycare38
- Bel Air Moose Lodge #195237
- Martin Marietta - Churchville Quarry37
- Old School Tavern37
- Hart Heritage37
- St. Pauls United Methodist Church35
- Williams Mobile Home Park35
- Dublin Elementary Rec Center35
- Bridges Montessori School35
- Foutz Chiropractic32
- Blue Crab House32
- Jacobs Well Assisted Living Home31
- Ayres Chapel United Methodist Church30
- Maple View Baptist Church30
- St Marks Catholic - White Hall30
- Creative Ways Learning Center30
- Clear View Mobile Home Park LLC28
- Susquehanna State Park (Campground)28
- Top of the Hill Manor Assisted Living26
- Kleins Shoprite (Cardiff) #55525
- Vfw Post 10146 - Darlington25
- Crossroads Station25
- Fallston Fresh Deli25
Harford County water systems: frequently asked questions
How many public water systems are in Harford County, Maryland?
EPA's SDWIS records file 226 active public water systems under Harford County, Maryland: 15 community systems (6.6%), 46 non-transient non-community systems (20%) and 165 transient non-community systems (73%).
Who supplies drinking water in Harford County, MD?
The largest community water systems filed under Harford County are Harford County D.P.W. (104,567 people served), City of Aberdeen (18,006 people served) and Chapel Hill - Aberdeen Proving Grounds (15,000 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Harford County's drinking water come from groundwater or surface water?
Of the 226 active public water systems in Harford County, 98% draw mainly on groundwater and 2.2% on surface water, counting purchased supplies. The largest system, Harford County D.P.W., uses surface water.
Where can I find a water quality report for Harford County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 15 community systems are filed under Harford County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Harford County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Maryland water systems
- All Maryland public water systems· 2,992 active
- Anne Arundel County· 405 systems
- Baltimore County· 272 systems
- Frederick County· 211 systems
- Carroll County· 208 systems
- Calvert County· 203 systems
- St. Mary's County· 194 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Harford County, Maryland”, https://aquacensus.com/water-systems/maryland/harford (data as of October 1, 2026).