Cultural water demand data including population, number of wells and the average well pumpage and non-groundwater use by the municipal, industrial and agricultural sectors are shown in Table 8.5-10. Effluent generation including facility ownership, location, population served and not served, volume treated, disposal method and treatment level is shown in Table 8.5-11. Figure 8.5-12 shows the location of demand centers. A description of cultural water demand data sources and methods is found in Volume 1, Appendix A. More detailed information on cultural water demands is found in Section 8.0.7.
Cultural Water Demands
- Refer to Table 8.5-10 and Figure 8.5-12.
- Population increased from 510,609 in 1980 to 835,504 in 2000 and projections suggest an increase to almost 1.5 million by 2030.
- Industrial water demand has and continues to be met almost exclusively by groundwater supplies. The major industrial users in the AMA are metal mines. In 2005 metal mines accounted for approximately 57% of the AMA’s total industrial water demand.
- Municipal water demand is the major demand sector and is steadily growing, however; much of that growth is being offset with non-groundwater sources. The 1991-1995 average annual non-groundwater use in the municipal sector reflects direct delivery of CAP water. The 2001-2005 non-groundwater average annual use reflects CAP use through recharge and recovery. Effluent is also used to meet municipal demand.
- Agricultural demand accounted for approximately 32% of the water demand in the AMA in 2001-2005.
- As of 2005 there were 7,145 registered wells with a pumping capacity of less than or equal to 35 gpm and 4,848 wells with a pumping capacity of more than 35 gpm.
- Refer to Table 8.5-11.
- 24 wastewater treatment facilities were identified in the AMA.
- A variety of effluent disposal methods are used in the AMA, with the majority of effluent discharged into the Santa Cruz River, stored at permitted recharge projects and used for golf course irrigation.
- More than 74,700 acre-feet of effluent is treated/generated annually in the AMA.
Table 8.5-10 Cultural Water Demand in the Tucson AMA
Table 8.5-11 Effluent Generation in the Tucson AMA
Figure 8.5-12 Tucson AMA Cultural Water Demand