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Howard County, Maryland — public water systems

At a glance

87 active public water systems are filed under Howard County, Maryland in EPA's SDWIS records, together reporting 309,341 people served. The largest is Howard County D.P.W. Distribution, which reports serving 286,158 people. 4 are community water systems serving people where they live; the other 83 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

87

Population served

309.3K

Community systems

4

Groundwater share

96.6%

How does Howard County compare with other Maryland counties?

Howard County has the 12th-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 309,341 people served in total, the 4th-largest county figure in the state and 5.3% of the statewide total. The average system here reports serving 3,556 people, about 83% above 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 Howard County's drinking water come from?

By primary water source, Howard County's active systems draw on groundwater (84, 97%) and purchased surface water (3, 3.4%). Overall, 97% rely mainly on groundwater (including purchased groundwater) and 3.4% 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, Howard County D.P.W. Distribution, draws primarily on purchased surface water.

What kinds of water systems operate in Howard County?

Howard County's active systems break down as 4 community systems (4.6%), 25 non-transient non-community systems (29%) and 58 transient non-community systems (67%). 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 (71%), local government (25%), state government (2.3%) and public/private partnership (1.1%).

The 50 largest water systems in Howard County

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Active public water systems in Howard County, Maryland
#Water systemCountyPopulation servedTypeSource
1Howard County D.P.W. DistributionHoward286,158CommunityPurchased surface water
2Glenelg High SchoolHoward1,532Non-transient non-communityGroundwater
3Bushy Park Es/Glenwood Ms ComplexHoward1,500Non-transient non-communityGroundwater
4Highs of CooksvilleHoward1,321Transient non-communityGroundwater
5Royal Farms StoreHoward1,015Transient non-communityGroundwater
6Glenelg Country SchoolHoward950Non-transient non-communityGroundwater
7Highs of FultonHoward758Transient non-communityGroundwater
8Mcdonalds of LisbonHoward735Transient non-communityGroundwater
9St Michaels Catholic ChurchHoward697Non-transient non-communityGroundwater
10Glenwood LibraryHoward671Transient non-communityGroundwater
11Folly Quarter Middle SchoolHoward667Non-transient non-communityGroundwater
12Dayton Oaks Elementary SchoolHoward595Non-transient non-communityGroundwater
13New Hope 7th-Day Adventist ChurchHoward558Transient non-communityGroundwater
14Inwood Village CenterHoward534Non-transient non-communityGroundwater
15Your Journey Child CareHoward533Transient non-communityGroundwater
16Triadelphia Ridge ElementaryHoward507Non-transient non-communityGroundwater
17Howard County Fair Main Exhibit HallHoward500Transient non-communityGroundwater
18Lisbon Elementary SchoolHoward492Non-transient non-communityGroundwater
19Mount Airy Christian AcademyHoward435Non-transient non-communityGroundwater
20Glenwood Community CenterHoward366Non-transient non-communityGroundwater
21Dunkin Donuts - WoodbineHoward363Transient non-communityGroundwater
22West Friendship Elementary SchoolHoward350Non-transient non-communityGroundwater
23Konstantines Greek TavernaHoward322Transient non-communityGroundwater
24Boarmans Meat MarketHoward320Transient non-communityGroundwater
25Lutheran Village at Miller'S GrantHoward315CommunityPurchased surface water
26Bolder GrillHoward310Transient non-communityGroundwater
27Schooley Mill ParkHoward307Transient non-communityGroundwater
28Clarksville LDS ChurchHoward300Transient non-communityGroundwater
29Country Corner Snowball, Inc.Howard259Transient non-communityGroundwater
30Larriland FarmsHoward252Transient non-communityGroundwater
31West Howard Swim ClubHoward220Transient non-communityGroundwater
32Therapeutic and Recreational Riding CtrHoward215Transient non-communityGroundwater
33St. Marks Episcopal ChurchHoward205Transient non-communityGroundwater
34Temple Isaiah Synagogue and PreschoolHoward203Non-transient non-communityGroundwater
35Howard County Fair 4h HallHoward200Transient non-communityGroundwater
36Howard County Fair (Office)Howard200Transient non-communityGroundwater
37Howard County Fairgrounds - Poultry BldHoward200Transient non-communityGroundwater
38Howard County Fair Wash Racks- Well #5Howard200Transient non-communityGroundwater
39Woodstock InnHoward183Transient non-communityGroundwater
40Villas at Cattail CreekHoward170CommunityGroundwater
41Lai Baptist ChurchHoward157Transient non-communityGroundwater
42Western Regional Park Pavilion WellHoward150Transient non-communityGroundwater
43Western Regional ParkHoward150Transient non-communityGroundwater
44Circle D Farms ( Dowd House)Howard149Transient non-communityGroundwater
45Cattail Creek Country ClubHoward145Transient non-communityGroundwater
46Carroll Motor Fuel - LisbonHoward137Transient non-communityGroundwater
47Calvary Lutheran ChurchHoward133Transient non-communityGroundwater
48Ledos PizzaHoward130Transient non-communityGroundwater
49Burntwoods ChurchHoward121Transient non-communityGroundwater
50Woodbine Inn and Collins InnHoward121Transient non-communityGroundwater

All other water systems in Howard County (37)

The remaining active systems filed under Howard County, largest first, with the population each reports serving.

Howard County water systems: frequently asked questions

How many public water systems are in Howard County, Maryland?

EPA's SDWIS records file 87 active public water systems under Howard County, Maryland: 4 community systems (4.6%), 25 non-transient non-community systems (29%) and 58 transient non-community systems (67%).

Who supplies drinking water in Howard County, MD?

The largest community water systems filed under Howard County are Howard County D.P.W. Distribution (286,158 people served), Lutheran Village at Miller'S Grant (315 people served) and Villas at Cattail Creek (170 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 Howard County's drinking water come from groundwater or surface water?

Of the 87 active public water systems in Howard County, 97% draw mainly on groundwater and 3.4% on surface water, counting purchased supplies. The largest system, Howard County D.P.W. Distribution, uses purchased surface water.

Where can I find a water quality report for Howard 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. 4 community systems are filed under Howard 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 Howard 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

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 Howard County, Maryland”, https://aquacensus.com/water-systems/maryland/howard (data as of October 1, 2026).