Water and Wastewater Calculations Manual

4: Quantity of Wastewater

4 Quantity of Wastewater

The quantity of wastewater produced varies in different communities and countries, depending on a number of factors such as water uses, climate, lifestyle, economics, etc. Metcalf and Eddy, Inc. (1991) lists typical municipal water uses and wastewater flow rates in the United States including domestic, commercial, institutional, and recreational facilities and various institutions.

A typical wastewater flow rate from a residential home in the US might average 70 gallons (265 L) per capita per day (gal/(c d) or gpcpd). Approximately 60 to 85 percent of the per capita consumption of water becomes wastewater. Commonly used quantities of wastewater flow rates that form miscellaneous types of facilities are listed in Table 6.1 (Illinois EPA 1997).

Table 6.1: Typical Wastewater Flow Rates for Miscellaneous Facilities

Type of establishment

Gallons per person per day (unless otherwise noted)

Airports (per passenger)

5

Bathhouses and swimming pools

10

Camps:

Campground with central comfort station

35

With flush toilets, no showers

25

Construction camps (semi-permanent)

50

Day camps (no meals served)

15

Resort camps (night and day) with limited plumbing

50

Luxury camps

100

Cottages and small dwellings with seasonal occupancy

75

Country clubs (per resident member)

100

Country clubs (per non-resident member present)

25

Dwellings:

Boarding houses

50

(additional for non-resident boarders)

10

Rooming houses

40

Factories (gallons per person, per shift, exclusive of industrial wastes)

35

Hospitals (per bed space)

250

Hotels with laundry (2 persons per room) per room

150

Institutions other than hospitals including nursing...

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