Below are rough water usage estimates so that businesses might build an understanding as it pertain to water usage.
| Facility | Water Usage |
| Assembly Halls | 2 gallons/sea |
| Apartment Buildings | 150-200 gallons/unit |
| Barber Shops | 55 gallons/day/chair |
| Beauty Salons | 270 gallons/day/chair |
| Bowling Alleys | 75 gallons/lane |
| Camps-Day (no meals) | 15 gallons/person/day |
| Resorts (day & night with limited plbg) | 35 gallons/person/day |
| Country Club per resident | 100 gallons /day |
| Country Club per non-resident member | 25 gallons/day |
| Factories – with shower | 35 gallons/shift |
| Factories – without shower | 25 gallons/shift |
| Farms: Cow | 12 gallons/day |
| Farms: Cow (dairy) | 15 gallons/day |
| Farms: Goat | 2 gallons/day |
| Farms: Hog | 4 gallons/day |
| Farms: Horse | 12 gallons/day |
| Farms: Mule | 12 gallons/day |
| Farms: Sheep | 2 gallons/day |
| Farms: Steer | 12 gallons/day |
| Farms: Chicken/100 | 10 gallons/day |
| Farms: Turkey/100 | 18 gallons/day |
| Food & Service Operations: Average restaurant | 70 gallons/seat |
| Food & Service Operations: 24 Hour restaurant | 100 gallons/seat |
| Food & Service Operations: Hotels | .256 gpd/sq ft |
| Institutions: Hospitals | 250 gallons/bed |
| Institutions: Rest Homes | 100 gallons/bed |
| Laundries: Coin Operated | 2.17 gpd/sq. ft. |
| Laundries: Commercial | .253 gpd / sq. ft |
| Motels | 100 gallons/unit |
| Office Building | 20 gallons/employee |
| Schools: Day (with cafeteria, gym, shower) | 25 gallons/ student |
| Schools: Day ( with cafeteria, gym) | 20 gallons/student |
| Schools: Day ( with cafeteria) | 15 gallons/student |
| Service Stations (estimate) | 10 gallons/vehicle |
| Shopping Centers | .160 gpd/sq. ft. |
| Stores | 400 gallons/toilet room |
| Movie Theatres | 2 gallons/seat |
| Trailer Parks | 100 gallons/space |
Boilers: to determine daily make up in gallons
- Multiply boiler horse power by 4.25
- Then multiply (1) by hours per day operation
- Then multiply by the % operating rating
- Then subtract the % of condensate return
Cooling Towers : to determine daily make up in gallons
- Multiply the tonnage by 4. (This includes 2 gal.(7.6 litre)/hour/ton evaporation and 2 gal (7.6 litre)/hour/ton bleed off}.
- Then multiply (1) by the hours per day operation.