Abel Recon 
Hap Witmer 
(717) 285-3103

Accent Control Systems
Randy McNulty
(610) 630-7640

ADS LLC Hydra-Stop
Brett Hanes
(708) 389-5111

Advanced Land & Water 
Mark Eisner 
(410) 795-4626

Alban Engine Power Systems
Roger Cook
(410) 796 8000

American AVK Co.
Chris Holroyd
(559) 425-4300

AMES, Inc.
Pete Orloski
(301) 621-8899

Angus Flexible Pipline 
Tim Zupko
(610) 594-4035

Aqueous Sales, Inc.
Bob Loughney
(804) 379-0019

ARM Group, Inc.
Debra Wilson
(717) 508-0542


ARRO Consultants, Inc. 
Richard Parks 
(301) 791-1100

Artesian Water Company, Inc.
Jim Buckland
(302) 453-6900

Atlantic Coast Labs
Keith Hausknecht
(302) 266-9121

Badger Meters, Inc.
Paul Fecht
(800) 876-3837

Bel Air Road Supply 
Hoang Tran 
(410) 732-9200

Bill Bailey Ins. Agency Inc.
John S. Bailey, II
(800) 926-8347

Biotech Operations
Fred Haifley

Brinjac Engineering, Inc.
Lawrence F. Flynn, PE,
(410) 584-6081

Cabe Associates, Inc.
Jeff Flairty
(302) 674-9280

Caldwell Tanks, Inc.
David Dues
(502) 964-3361

Calvert Well Drilling
(410) 535-2804

Camden Pumps & Equipment
Patrick Dorsey
(410) 752-2513

Century Engineering
Wayne Davis
(443) 589-2400

Charles Morrow & Assoc.
Chip Morrow
(610) 282-0302

Chesapeake Labs, Inc.
Fred Grozinger
(410) 546-1318

CLA-VAL Co.
Dan Esser
(800) 451-3030

Corrosion Control Corp.
Rick Ward
(856) 299-4200

Coyne Chemical Env.
John Snow
(301) 865-0821

CPI² (Cathey ProSolutions, Inc.)
Joe Cathey
(410) 795-2301

Cretex Specialty Products
Alan Thompson
(262) 542-8153

Davis, Bowen & Friedel 
Gerald G. Friedel, P.E. 
(410) 543-9091 

Delcora
Robert Powell 
(610) 876-5523

Delta Engineering Sales
Patricia Funk
(610) 873-2290

DEMCO, Inc. 
Mark Ashley
(410) 749-1377 

Digitalogic, Inc.
John Arnott
(410) 662-9500

DSI, Inc.
Phillip Strayer
(410) 752-2514  

Dutchland, Inc. 
Sandi Jaques 
(717) 442-8282 

E.H. Wachs Company
Mark Vanore
(847) 537-8800

EADS Group, Inc.
John Roman
(301) 777-7878

Earth Vector Systems
Cindy Moore
(434) 817-5000

East Jordan Iron Works
Mark Baum
(800) 418-3549

Eastern Technical, Inc.
William Hartman
(410) 882-8272

Eichelbergers, Inc.
Ted A. Gayman
(717) 766-4800

Envirep, Inc.
Dwight Swan
(410) 552-6985

Excelsior Blower Systems, Inc.
Brett Jorgensen
(410) 536-0316

Ferguson Enterprises, Inc.
Bob Johns
(410) 573-6624

Flow Controls, Inc.
Robert J. Buhner, P.E.
(410) 882-0200

Flowtronex PSI, Inc.
Reed Johnson
(704) 658-8112

Fluid Conservation Systems
Michael Funk
(800) 531-5465

Fluid Conservation Tech.
Nate Stauffer 
(717) 274-7574

Fluid Solutions, Inc.
Robert Krone
(443) 324-2979

Ford Meter Box Co., Inc. 
Joe Rodgers
(804) 651-9928

Fort Ritchie I, LLC
COPT Property Management Services
Michael Vos 
(301) 241-4050

Franklin Electric Co, Inc.
Duane LeBoeuf
(973) 668-5066

Freemire & Associates
Roy Freemire
(410) 768-8500

Gardner O'Connor, Inc.
William Levitt
(410) 437-0800

GE Sensing
Howard Solomon
(410) 443-7373

Geiger Pumps & Equipment
David Evers
(410) 682-2660

George, Miles & Buhr
Katie Sapna
(410) 742-3115

Godwin Pumps
Dale Brackin
(856) 467-3636

Griggs Sales Corporation 
Dan Dougherty 
(757) 490-1541 

Hach Co.
Greg Most
(800) 227-4224

Hartwell Engineering, Inc.
Tim Hartwell
(410) 451-7335


HD Supply Waterworks of DE
Jesse Loughney
(302) 737-1500 

Heyward, Inc. 
John Seaman
(757) 414-0384 

Hill's Electric Motor Service
Mark Hill 
(410) 228-4447

Hopkins Construction, Inc.
Carey Saddler
(302)337-3366

Hydro Designs, Inc.
Barry Walter / John Hudek
(248) 250-5000

Hydrosource Associates 
Tom Kelsey
(603) 968-3733

Industrial Service Contractors, Inc.
Richard DeLoach, Jr.
(800) 424-1980

InSource Solutions
Mark Matassa
(410) 644-6700

Instrulogic Corporation
Scott Teter 
(540) 338-2222

Intercoastal Trading, Inc. 
George Robinson
(410) 228-1111 

Itron, Inc. 
Dan Pence 
(509) 891-3678 

J.C. Ehrlich
William Dorenburg
(302) 337-8100

J.P. McElvenny Co., Inc.
John P. McElvenny
(610) 518-5499

Jet Blast, Inc.
Ed Jefferson
(410) 636-0730

John E. Harms Jr. & Associates, Inc
Mitchell Harris, P.E.
(410) 647-6000

John W. Tieder, Inc.
John W. Tieder
(410) 228-5262

Kappe Associates, Inc.
Daniel Thompson
(301) 724-1627

Kelly Generator & Equipment, Inc.
Todd Smith
(410) 257-5225

Kershner Environmental
Robert Kershner
(410) 581-0555

Kleinfelder, Inc.
Ethan Weikel
(410) 850-0404 

Krohne, Inc.
David Spitzer
(800) 356-9464

L/B Water Service South
David Smith
(301) 682-9580 

LaMotte Chemical Products
Tom Seechuk
(410) 778-3100

Lankford Sysco
Joe Davis
(410) 677-5569

Layne Christensen
Neil Winner
(410) 279-0184

Logics, LLC 
Wanda Ennis 
(919) 232-2323 

M & H Kennedy Valve
Michael J. Burkardt
(610) 715-9108

Magyar & Associates, Inc.
Bob Pinkerton
(410) 620-9555 

Maryland Env. Svs.
Tim Germana
(410) 729-8386

Maryland Rural Dev. 
Joyce DeLaurentis 
(410) 479-1063

Master Meter, Inc.
Dan Reed
(315) 247-9582

McCrone, Inc.
Barry Ebersole
(410) 267-6947

Maryland Industrial Trucks, Inc.
Mike Moylan
(410) 636-1255

Maryland State Highway
Donald Fisher

Metrotech Mid-Atlantic
Alan Banks
(800) 446-3392 
 
Mid-Atlantic Waste Systems
John Tirabassi
(410) 820-7188 x4005

Mid-Atlantic Storage Systems
Greg Mullins
(740) 335-2019

Miller Environmental, Inc.
George H. Smith
(410) 378-2777

Miller Pipeline Corp.
Steve Kasmine
(317) 293-0278

Motor Technologies
Bill Kohr
(717) 266-4045

MTEK, Inc./Bio-Systems
Doug Snyder
(800) 733-6835

Mueller Co.
Mike Cackowski
(301) 473-1250

Municipal Solutions
M.T. Yakemchuk
(877) 655-5585

Natgun Corporation
Susan Rill
(610) 370-2790

Neptune Technology Group
Vincent McCaffery
(804) 673-5321 

North East Technical Sales
Joe Gunn
(215) 513-1000

Phillip R. Walker & Assoc, Inc.
Steve Walker
(410) 666-2142

Phoenix Contact
Bill Schalon
(240) 529-6917

Pittsburg Tank & Tower 
Don Johnston 
(270) 826-9000 ext. 228 

Pleasants Construction, Inc.
Tim Cook
(301) 428-0800

Pollardwater.com
Brian Dougan
(800) 437-1146

Potter & Parsons, Inc
Bill Ludwig 
(410) 828-5544

PW Technologies LLC
Alex Davey
(410) 238-7977

Red Flint Sand & Gravel
John Prock
(715) 855-7600

Re-Ox, LLC 
Jackie Peterson 
(913) 583-9916

Reid Engineering Company, Inc.
Shane Reid
(540) 371-8500

Riodan Materials
Tom Schell
(301) 858-0609

Romac Industries
Tye Babb
(800) 258-7448

Rummel-Klepper & Kahl, LLP 
Steven Stachowski
(410) 728-2900

SAA
Jennifer Williams
(903) 832-2581

Sensors & Software Inc.
Carrie-Ann Amyot
(905) 624-8909

Sensus
Avery Rose
(717) 540-0500

Severn Trent Environmental
Ron Carter
(410) 392-0711

Sherwood-Logan & Assoc.
Robert Fairweather
(410) 841-6810

Southern Corrosion, Inc.
Richard Skilton
(302) 275-1156

Square One Electric Service
Ed Crumbock
(302) 678-0400

STH, Inc.
Carroll Holmes
(301) 682-3390 

Synagro Mid-Atlantic
Michael Toole
(410) 284-4120

T.E. Byerly Co., Inc.
Thomas Byerly
(410) 252-6420

T&N Electric Services, Inc.
Stanley E. Lawson, Jr.
(410) 273-2395

Thrasher Engineering, Inc.
Clay P. Riley, P.E.
(301) 334-3866

Tidewater Utilities, Inc.
Carol Murphy
(302) 734-7500

TRB Specialty Rehab.
Eric Ritter
(410) 923-1182

Univar USA Inc.
Jayanna Yeakle
(717) 948-5362

URS Corporation
T. Wilkes Coleman
(302) 277-7643

USA BlueBook
Joyce Kendall
(800) 548-1234

Utilities Service Co., Inc.
Regina Arthur
(800) 223-3695 

Valve-Tech Sales
David Stinchcomb
(610) 746-6406

View Engineering
Craig Yendell
(301) 840-1030

W.D. Fox Welding, Inc.
Jeff Fox
(717) 252-3908

Wallace, Montgomery
Jim Wolf
(410) 494-9093

Water Testing Labs of Maryland, Inc.
Daniel Shields
(410) 643-7711

Watermark Corp / Harmsco Filtration
Peter Auchincloss
(410) 448-9900

Whel Tech, Inc.
Ruth Welley
(410) 744-5308

Whitman, Requart & Assoc. 
Dennis Hasson 
(443) 224-1531