| 2429 | Water, distilled, manufacturing | |
| 4100 | Water, electricity and gas (primarily water) | |
| 1554 | Water, flavoured, manufacturing | |
| 5220 | Water, mineral, retail | |
| 1554 | Water, naturally carbonated, purifying and bottling | |
| 1554 | Water, purifying and bottling | |
| 5139 | Waterbeds, wholesale | |
| 5233 | Waterbeds-retail | |
| 5239 | Watercraft, retail | |
| 6303 | Waterfront terminal operation | |
| 2520 | Watering cans, plastics, manufacturing | |
| 2424 | Waterless hand soaps, manufacturing | |
| 0112 | Watermelon farming | |
| 7421 | Waterparks designing service | |
| 5131 | Waterproof footwear, wholesale | |
| 5131 | Waterproof outergarments, men's and boys', wholesale | |
| 5131 | Waterproof outergarments, women's and children's, wholesale | |
| 4530 | Waterproofing and restoration | |
| 1810 | Waterproofing clothing | |
| 4530 | Waterproofing concrete | |
| 1729 | Waterproofing fabrics, for the trade | |
| 4530 | Waterproofing, contractors | |
| 1810 | Water-repellent overcoats (except fur, leather), women's and misses', cut and sewn from purchased fabric | |
| 1810 | Water-resistant overcoats (except fur, leather), women's and misses', cut and sewn from purchased fabric | |
| 4520 | Waterway construction, general contractors | |
| 4100 | Waterworks operation | |
| 3312 | Watt-hour and demand meters, combined, manufacturing | |
| 3312 | Watt-hour and time switch meters, combined, manufacturing | |
| 3312 | Watt-hour meters, electric, manufacturing | |
| 5150 | Watt-hour meters, wholesale | |
| 2411 | Wattle extract, manufacturing | |
| 3312 | Wattmeters, manufacturing | |
| 9241 | Wave pools | |
| 3312 | Waveform measuring and/or analyzing equipment, manufacturing | |
| 3699 | Wax figures (i.e., manikins), manufacturing | |
| 9232 | Wax museums | |
| 2424 | Wax removers, manufacturing | |
| 2101 | Waxed paper for non-packaging applications, made from purchased paper | |
| 2101 | Waxed paper for packaging applications, made from purchased paper | |
| 2101 | Waxed paper, made from purchased paper | |