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Sources: Thomann and Mueller (1987), Leo et al. (1984).

Notes: Less than secondary = Primary and advanced primary wastewater treatment. Greater than secondary = Advanced secondary and advanced wastewater treatment.

Sources: Thomann and Mueller (1987), Leo et al. (1984).

Notes: Less than secondary = Primary and advanced primary wastewater treatment. Greater than secondary = Advanced secondary and advanced wastewater treatment.

TABLE 2-4 Inventory of POTWs by Wastewater Type, 1940-1996

Treatment Type

Less than Greater than No

Less than Greater than No

TABLE 2-4 Inventory of POTWs by Wastewater Type, 1940-1996

Treatment Type

Year

Total

Raw

Secondary

Secondary

Secondary

Discharge

0 0

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