| St. John's River Water Management District-SA |
619 |
| Earth Tech, Inc. |
432 |
| American Water Company, Inc. |
361 |
| SRP Salt River Project |
357 |
| Nalco Company |
349 |
| Kiewit Pacific |
334 |
| Lower Colorado River Authority |
333 |
| Los Angeles Department of Water and Power |
318 |
| Michael Baker Corporation |
304 |
| Pentair, Inc. |
274 |
| City of Anaheim |
206 |
| Covanta Energy Corporation |
191 |
| Veolia Water North America |
160 |
| United Water Resources |
153 |
| Anglian Water Services Limited |
149 |
| Aqua America, Inc. |
147 |
| Board of Water Commissioners, City and County of Denver, Colorado |
143 |
| East Bay Municipal Utility District |
129 |
| Severn Trent Water Ltd |
129 |
| Orlando Utilities Commission |
124 |
| Carollo Engineers, P.C. |
117 |
| San Francisco Public Utilities Commission |
116 |
| Las Vegas Valley Water District |
112 |
| Gainesville Regional Utilities Inc. |
109 |
| Imperial Irrigation District |
104 |
| Southwest Water Company |
96 |
| Washington Suburban Sanitation Commission |
94 |
| Chelan County Public Utility District |
87 |
| Northumbrian Water Ltd. |
84 |
| The O'Brien & Gere Companies |
84 |
| California Water Service Company |
84 |
| Yorkshire Water |
84 |
| American States Water Company |
83 |
| Severn Trent Services |
82 |
| GE Water and Process Technologies |
81 |
| Hancor Inc |
81 |
| Parametrix, Inc. |
76 |
| EMA Services Inc |
72 |
| Memphis Light, Gas and Water Division |
72 |
| Three Valleys Water PLC |
71 |
| Thames Water |
71 |
| American Water Works Association |
68 |
| Detroit Water and Sewage Department |
62 |
| Southern Water |
60 |
| Gundle/SLT Environmental, Inc. |
59 |
| Paulus Sokolowski & Sartor |
58 |
| Wolseley Mechanical |
57 |
| County of Olmsted |
57 |
| General Chemical Corporation |
56 |
| The Metropolitan District |
53 |
| Heritage Environmental Services, LLC |
53 |
| Telvent |
51 |
| Freese and Nichols, Inc. |
51 |
| Greeley and Hansen, |
50 |
| Wessex Water |
49 |
| Henderson Water Utility, the |
48 |
| Golden State Water Company |
47 |
| Fairfax Water |
45 |
| Aqua-Chem, Inc. |
43 |
| WaterOne |
43 |
| Padre Dam |
43 |
| Birmingham Water Works |
41 |
| Eaga Partnership Ltd |
41 |
| Aquarion |
41 |
| Lojic |
40 |
| Middlesex Water Company |
39 |
| south central CT regional water authority |
37 |
| Inland Empire Utilities Agency |
36 |
| Fuscoe Engineering |
35 |
| Coachella Valley Water Dist |
34 |
| Cleveland, City of |
33 |
| Provincial Government of the Western Cape |
33 |
| O&G Industries, Inc. |
32 |
| Kelda Group plc |
32 |
| El Dorado Irrigation District |
31 |
| Bristol Water Holdings plc |
31 |
| Central Arkansas Water |
31 |
| Lakehaven Utility District |
30 |
| Suffolk County Water Authority |
30 |
| Pennsylvania American Water |
30 |
| Robinson, Waters |
28 |
| Florida Keys Aqueduct Authority (FKAA) |
28 |
| GE Water & Process Technologies |
27 |
| Louisville Water Company |
27 |
| Damon S. Williams Associates, LLC |
26 |
| Clear Creek Associates |
26 |
| South West Water Ltd |
26 |
| 2M Corp |
25 |
| T and M Associates |
25 |
| Carthage Water & Electric |
25 |
| Clow Valve Company |
24 |
| Crane Environmental, Inc. |
24 |
| El Paso Water Utilities |
24 |
| Southern Nevada Water Authority |
24 |
| National Ground Water Association |
24 |
| Hersey Meters |
24 |
| Evergreen Energy Inc |
23 |
| American Canyon Utility Water |
22 |
| Northern Colorado Water Conservancy District |
22 |
| Myers Water Plant |
22 |
| BTL Industries |
22 |
| Severn Trent Plc |
22 |
| Alcosan |
21 |
| Alar Engineering Corporation |
21 |
| Essex |
21 |
| BIWATER TREATMENT LIMITED |
21 |
| MIOX Corporation |
20 |
| Pittsburgh Water & Sewer Authority |
20 |
| Utility Pipe Sales |
20 |
| Fairfax County Water Authority |
19 |
| Western Summit Constructors, Inc. |
19 |
| UTILX Corporation |
19 |
| Brick Township Municipal Utilities Authority |
19 |
| Regenesis |
19 |
| CUNO Incorporated |
19 |
| Grand Strand Water |
19 |
| Spartanburg Water System |
19 |
| Metro Wastewater Reclamation District |
19 |
| Wildermuth |
19 |
| Koester Associaties |
19 |
| New Braunfels Utilities |
18 |
| Krieger & Stewart, Incorporated |
18 |
| ENTACT LLC Environmental Services |
18 |
| Infilco Degremont Inc. |
18 |
| South East Water |
18 |
| Passaic Valley Water Commission |
18 |
| MT LAUREL TWP MUNI UTIL AUT |
18 |
| Etna Supply Company |
17 |
| Pacific Groundwater Group |
17 |
| Lewis County |
17 |
| Computer Express, Inc. |
17 |
| Southface Energy Institute |
17 |
| Guadalupe Blanco River Auth |
17 |
| In-Situ |
17 |
| Avogadro Group |
17 |
| ABS Pumps Inc |
17 |
| Ecodyne Limited |
16 |
| Sydney Water |
16 |
| Hydro Quebec |
16 |
| Providence Water Supply Board |
16 |
| Utility Equipment Company |
16 |
| ESI Ltd |
16 |
| Bournemouth and West Hampshire Water |
15 |
| Aquatera |
15 |
| Henry County Water Co |
15 |
| Narragansett Bay Commission |
15 |
| Monroe County Water Authority |
15 |
| MECO Incorporated |
15 |
| InfrastruX Group, Inc. |
14 |
| Vista Irrigation District |
14 |
| Santa Margarita Water District |
14 |
| Green Bay Metropolitan |
14 |
| Pueblo Water |
14 |
| Water Missions International |
14 |
| Prince William County Service Authority |
14 |
| Bridgewater HOME Inc |
13 |
| Pennon Group Plc |
13 |
| OKANOGAN COUNTY PUD |
13 |
| CES International |
13 |
| Moulton Niguel Water District |
13 |
| Consolidated Utility District |
13 |
| AEC, Inc. |
13 |
| Arizona Water Company |
13 |
| Minol |
13 |
| E.H. Wachs |
13 |
| Ashbrook Simon-Hartley |
12 |
| CO Water |
12 |
| Chester Water Authority |
12 |
| Municipal Water Authority |
12 |
| Montgomery Water Works Board |
12 |
| American Hydro Corp |
12 |
| Erie Water Works |
12 |
| Erie County Water Auth |
12 |
| Mountain Valley Spring Company, LLC |
12 |
| PBC Water Utilities Department |
12 |
| Eco-Tec Inc. |
11 |
| North Marin Water District |
11 |
| Ace Clearwater Enterprises |
11 |
| Kitsap County PUD |
11 |
| MCS of Tampa |
11 |
| The Astbury Group |
11 |
| South Coast Water District |
11 |
| Hci Publications |
11 |
| balance hydrologics |
11 |
| Crown Solutions Inc |
11 |
| Yorkshire Water Services |
11 |
| Alameda Countywide Clean Water Program |
10 |
| Watertech Corporation |
10 |
| Brentwood Water Dept |
10 |
| Zone 7 Water Agency |
10 |
| Matcor Inc |
10 |
| Richard Water Treatment Plant |
10 |
| Green Empowerment |
10 |
| Edwards Aquifer Authority |
10 |
| South Adams County Water |
10 |
| British Antarctic Survey |
10 |
| WaterHealth International Inc. |
10 |
| Kenning Inc |
10 |
| Collingwood Utility Services |
10 |
| Helmers |
10 |
