Other States:
MARYLAND
Population: 5,296,486

Information on the state of Maryland is available for the following topics. To review this information, click on the links below.

Contacts| Regulations, Statutes & State Codes | Quick Facts | Septic Stats

Onsite Demonstration Programs | Onsite Management Communities

 

 

Contacts:
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Jay Prager, Chief, Onsite Sewerage & Water Supply
Acting Program Manager
Maryland Department of the Environment
Water Management Administration
2500 Broening Highway
Baltimore, Maryland 21224
(410) 631-3780
(410) 631-3163 (fax)

jprager@mde.state.md.us

http://www.mde.state.md.us/comar/dsd_web/

 

Regulations, Statutes & State Codes:
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Maryland State Regulations

Maryland Constitutions, Statutes and Codes

Sewage Disposal and Certain Water Systems for Homes and Other Establishments
in the Counties of Maryland Where a Public Sewage System Is Not Available
Title 26, Subtitle 04, Chapter 02
October 26, 1992

Water Supply and Sewerage Systems in the Subdivision of Land in Maryland
Title 26, Subtitle 04, Chapter 03
October 26, 1992

Design and Construction Manual for Sand Mound Systems
June 1991

The last revision to Maryland onsite regulations occurred June 1991 and October 1992. Currently, there are no proposed revisions within the next year.

Those conventional technologies approved for onsite wastewater treatment and disposal include trench, mound, at-grade, and waterless toilet. Alternative technologies include low-pressure pipe, mound, at-grade, recirculating sand filters, and aerobic treatment units. Drip and wetland technologies are considered innovative. Technologies not previously approved may be allowed for system repair.

Maryland does not require management districts or systems to maintain and monitor onsite systems.

Surface discharge is not an option for onsite systems in Maryland, but any technology that can demonstrate meeting of discharge standards is allowed. An NPDES permit is required, and the Maryland Department of the Environment, Water Management Administration, is the permitting agency.

Maryland Code does not allow for drainfield area/size reductions except with secondary treatment on systems treating less than 5,000 gpd. The parameter is set for 30/30 BOD5 and TSS along with an individual discharge permit.

A funding program exists to assist homeowners replacing a failing system or installing a new one. Questions may be directed to Prager (above).

Maryland Code currently recognizes/requires management districts or systems to maintain and monitor onsite systems for large systems. The local agency may have authority to adopt or require maintenance/management programs for non-conventional systems.

Records for the number the permits issued annually are maintained at the local level.

According to Prager (above), the most common reason for system failure in Maryland is likely old systems installed in an inappropriate area.

Maryland does not have a licensing/certification program for onsite wastewater professionals, nor do site evaluations/inspections require licensing or certification.

Steve Luckman, Maryland Department of the Environment, may be contacted for information regarding municipal wastewater regulations.

 

Quick Facts:
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Total number of onsite systems: About 350,000 (1990 U.S. census reports About 343,000).

Number of new systems installed each year: About 7000-8000.

Failure definition: Effluent surfacing, or contaminating drinking water supplies or surface
water.

Number or proportion of systems presently failing: About 3000-4000.

Number or proportion repaired annually: About 2000-3000.

Number or proportion replaced annually: About 2000-3000.

Number or proportion of repairs or replacements that require alternative technology (e.g.,
sand filters, pressure dosing):
Approximately 50%; (20% sand filters, or recirculating sand
filters; 20% sand mounds, fewer than 10% drip irrigation systems).

Number or proportion of repairs or replacements that require advanced technology (e.g.,
disinfection, nutrient removal):
None required.

Cost of a conventional septic system installation: $3000-5000 for a conventional drainfield
system, up to $10,000 for a mound system.

Cost of a centralized sewer tie-in (including fees and cost of the sewer lateral): About
$10,000.

 

Septic Stats:
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TOTAL PERSONS TOTAL HOUSING UNITS PUBLIC SYSTEM DRILLED WELL DUG WELL OTHER PUBLIC SEWER SEPTIC TANK OTHER MEANS
MARYLAND 4,781,468 1,891,917 1,565,946 283,750 31,405 10,816 1,533,799 342,523 15,595
COUNTIES
ALLEGANY 74,946 32,513 26,469 4,813 345 886 27,004 5,187 322
ANNE ARUNDEL 427,239 157,194 116,263 36,367 4,210 354 117,542 38,739 913
BALTIMORE 692,134 281,553 257,091 22,272 1,573 617 248,979 31,759 815
BALTIMORE CITY 736,014 303,706 303,280 162 31 233 299,051 1,478 3,177
CALVERT 51,372 18,974 5,246 11,931 1,581 216 2,506 15,915 553
CAROLINE 27,035 10,745 3,942 5,955 788 60 3,567 6,877 301
CARROLL 123,372 43,553 18,269 23,198 1,506 580 16,989 25,969 595
CECIL 71,347 27,656 10,324 14,643 2,369 320 10,324 16,810 522
CHARLES 101,154 34,487 21,667 8,473 3,901 446 20,042 13,383 1,062
DORCHESTER 30,236 14,269 7,344 6,171 642 112 7,203 6,440 626
FREDERICK 150,208 54,872 30,540 22,151 1,335 838 30,726 23,407 739
GARRETT 28,138 14,119 3,340 8,196 398 2,185 4,752 8,829 538
HARFORD 182,132 66,446 42,868 21,132 1,930 516 41,146 24,750 550
HOWARD 187,328 72,583 62,113 9,738 584 148 60,624 11,729 230
KENT 17,842 8,181 3,523 3,821 745 92 3,768 4,101 312
MONTGOMERY 757,027 295,723 283,232 11,452 944 95 278,172 17,024 527
PRINCE GEORGES 729,268 270,090 264,916 3,467 1,520 187 259,759 9,378 953
QUEEN ANNES 33,953 13,944 2,135 10,789 937 83 4,274 9,363 307
ST. MARY'S 75,974 27,863 10,276 14,718 2,670 199 8,648 18,462 753
SOMERSET 23,440 9,393 3,949 4,868 409 167 3,665 5,489 239
TALBOT 30,549 14,697 6,782 7,357 522 36 6,952 7,568 177
WASHINGTON 121,393 47,448 34,375 9,973 840 2,260 29,265 17,537 646
WICOMICO 74,339 30,108 14,398 14,446 1,171 93 14,269 15,454 385
WORCESTER 35,028 41,800 33,604 7,649 454 93 34,572 6,875 353

 

Onsite Demonstration Programs:
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Anne Arundel County is part of the National Onsite Demonstration Project, and is evaluating
a number of new technologies.

Onsite Management Communities:
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No information is available on Onsite Management Communities in Maryland.