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21 Design Group
Washington, MO 63090
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Our Story
Our main lines of business include: Concrete Contrs.--Sidewalks/Floors/Flat, Sewage Treatment Plants, Water Treating Svc., Equip., & Chemicals.
21 Design Group has been listed in the Blue Book since 2017.
What We Do
- Concrete Contrs.--Sidewalks/Floors/Flat
- Sewage Treatment Plants
- Water Treating Svc., Equip., & Chemicals
Regions & Counties Serviced
- Missouri - St. Louis
Missouri 1
- Franklin
Our CSI Codes
03 11 13.13 - Concrete Slip Forming
03 35 23 - Exposed Aggregate Concrete Finishing
03 35 26 - Grooved Concrete Surface Finishing
22 13 23 - Sanitary Waste Interceptors
22 13 26 - Sanitary Waste Separators
22 13 29.33 - Sewerage Pump Basins and Pits
22 13 36 - Packaged, Wastewater Pump Units
22 13 43 - Facility Packaged Sewage Pumping Stations
22 13 43.13 - Facility Dry-Well Packaged Sewage Pumping Stations
22 13 43.16 - Facility Wet-Well Packaged Sewage Pumping Stations
22 14 29.19 - Sump-Pump Basins and Pits
22 31 13 - Residential Domestic Water Softeners
22 31 16 - Commercial Domestic Water Softeners
22 32 13 - Domestic-Water Bag-Type Filters
22 32 16 - Domestic-Water Freestanding Cartridge Filters
22 32 19 - Domestic-Water Off-Floor Cartridge Filters
22 32 23 - Domestic-Water Carbon Filters
22 32 26 - Domestic-Water Sand Filters
22 32 26.13 - Domestic-Water Circulating Sand Filters
22 32 26.16 - Domestic-Water Multimedia Sand Filters
22 67 13.16 - Reverse-Osmosis Water Piping
22 67 13.19 - Deionized-Water Piping
22 67 19 - Processed Water Equipment for Laboratory and Healthcare Facilities
22 67 19.13 - Distilled-Water Equipment
22 67 19.16 - Reverse-Osmosis Water Equipment
22 67 19.19 - Deionized-Water Equipment
23 25 13 - Water Treatment for Closed-Loop Hydronic Systems
23 25 16 - Water Treatment for Open Hydronic Systems
23 25 19 - Water Treatment for Steam System Feedwater
23 25 23 - Water Treatment for Humidification Steam System Feedwater
23 51 43.16 - Particulate Filtration
32 16 13.13 - Cast-In-Place Concrete Curbs and Gutters
32 16 13.16 - Cast-In-Place Concrete Curbs
32 16 13.19 - Cast-In-Place Concrete Gutters
33 12 23 - Water Utility Pumping Stations
33 32 13 - Packaged Utility Lift Stations
33 32 13.13 - Packaged Sewage Lift Stations, Wet Well Type
33 32 16 - Packaged Utility Wastewater Pumping Stations
33 32 16.13 - Packaged Sewage Grinder Pumping Units
33 32 19 - Public Utility Wastewater Pumping Stations
41 14 16 - Batch Cars/Transports
41 14 19 - Batch Hoppers
43 32 56 - Reverse-Osmosis Purification Units
43 32 66 - Vacuum Degasifiers
43 32 69 - Chemical Feed Systems
43 32 76 - Chlorination Equipment
44 06 40 - Schedules for Water Treatment Equipment
44 40 00.00.01 - Water Treatment Equipment
44 41 13 - Packaged Water Treatment Plants
44 41 13.13 - Chemical Packaged Water Treatment Plants
44 41 13.16 - Biological Packaged Water Treatment Plants
44 41 13.19 - Thermal Packaged Water Treatment Plants
44 42 26 - Water Treatment Comminutors
44 42 59 - Water Treatment Reactors
44 43 13 - Water Filters
44 44 13 - Water Treatment Chemical Feed Equipment
44 44 19 - Water Coagulators
44 44 23 - Water Dechlorinators
44 44 29 - Water Emulsifiers
44 44 33 - Water Emulsion Crackers
44 44 36 - Water Flocculators
44 44 39 - Water Fluoridation Equipment
44 44 46 - Water Hydrothermal Equipment
44 44 49 - Water Oils Treatment Equipment
44 44 53 - Water Oxidation/Reduction Equipment
44 44 56 - Water Ozone Equipment
44 44 69 - Water Pretreatment Equipment
44 45 13 - Water Biofilters
44 46 26 - Sludge Thickeners
