SUMMARY.

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Colin Berry
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1 SUMMARY Regional Water Quality NEWSLETTER DATE: Report for February 2017 A Tempe, Glendale, Peoria, Chandler, Phoenix, ADEQ, CAP, SRP, Epcor NSF Central Arizona-Phoenix Long-Term Ecological Research ASU Regional Water Quality Partnership 1. Taste and Odor compounds were almost all below detection limits including all reservoir samples from quarterly samples. Two canal samples were above the threshold detection level of 10 ng/l for MIB (Waddel Canal and AZ Canal at 56 th Street). 2. UV absorbance values were very similar for canal and WTP samples. UV absorbance values were above 0.1 for Bartlett samples which could impact water quality as this is a significant increase. UV values were also high for Roosevelt which is probably a consequence of the run-off that is filling the reservoir. The new DOC/TN instrument is finally up and running and full data will be collected in March. 3. The primary source of surface water was Verde River water at the time of sampling. CAP diversions while groundwater pumping was the second largest source. Run-off to the reservoirs continues to be above average and releases over the Granite Reef diversion dam began on 2/ Microbial concentrations were for coliforms continue to remain lower, however there were some increases possibly due to run-off. A similar trend was observed for Mycobacterium. 1

2 Topics Du Jour Microbial Water Quality Data Over the years the regional water quality center has collected data on numerous different topics but very little data has been collected on basic microbial water quality. Therefore, we have initiated microbial sampling for E. Coli, total coliforms and mycobacterium in the canal system to determine potential impacts on both water quality and sources of possible contamination. The values for coliforms for sampling in December are lower than the previous months consistent with the decrease in temperatures. Several samples had elevated levels of Mycobacterium. Note that Mycobacterium require one month to process and the samples are from November. All Values are cfu per 100 ml Sample E. coli Coliform Blank Average 0 0 AZ Canal at Highway 87 average South Canal below CAP Cross- connect average N/A N/A Cap Canal at Cross-connect average N/A N/A AZ Canal at 56th St. average AZ Canal- Central Avenue average Pima Average AZ Canal above CAP Cross-connect average Waddell Canal average Verde Beeline average AZ Canal below CAP Cross-connect average head of the Consolidated Canal average Middle of Consolidated Canal average Head of Tempe Canal average Mycobacterium (January) colonies 0 AZ Canal at Highway 87 2 South Canal below CAP Cross- connect N/A Cap Canal at Cross-connect 0 AZ Canal at 56th St. 0 AZ Canal- Central Avenue 0 AZ Canal at Pima 3 AZ Canal above CAP Cross-connect 0 Waddell Canal 0 Verde Beeline 88 AZ Canal below CAP Cross-connect 14 1

3 head of the Consolidated Canal 100 Middle of Consolidated Canal 0 Head of Tempe Canal 96 CONT Contaminated with other bacteria 2

Source Trend in supply Discharge to water supply system Salt River Verde River Reservoirs at 60% full Reservoirs At 84% full Quick Update of Water Supplies for February, 2017 (during day of canal/wtp

4 Source Trend in supply Discharge to water supply system Salt River Verde River Reservoirs at 60% full Reservoirs At 84% full Quick Update of Water Supplies for February, 2017 (during day of canal/wtp February 6th, 2017) Flow into SRP Canal System Dissolved organic carbon Concentration (mg/l) ** 8 cfs 195 cfs into Arizona 2.9 mg/l Canal 208 cfs 67 cfs into South Canal 3.0 mg/l 68 cfs of CAP water into Arizona Canal Colorado River Pleasant is 87.4% full ( Powell is 46.1% full) Pleasant is* releasing 0 cfs Groundwater Pumping *** 252 cfs pumping by SRP *CAP is not releasing from Pleasant **Concentration of DOC in the terminal reservoir ***CAP water is being delivered to the Arizona Canal. 252 cfs Groundwater Pumping into SRP Canals 3.0 mg/l 0.5 to 1 mg/l Data from the following websites:

5 The following views are from SRP website, and show which wells are operating along the various canals. 4

6 5

7 Dissolved Organic Carbon In Reservoirs and Treatment Plants DOC = Dissolved organic carbon UV254 = ultraviolet absorbance at 254 nm (an indicator of aromatic carbon content) SUVA = UV254/DOC TDN = Total dissolved nitrogen (mostly nitrate from groundwater) February 2017 Data Reservoir Samples - February 5th-6th, 2017 Sample Description Location DOC (mg/l) UV254 (l/cm) SUVA (L/mgm) Havasu (March) N/A #VALUE! N/A TDN (mg/l Pleasant (March) Epilimnion N/A #VALUE! N/A Hypolimnion N/A #VALUE! N/A Verde River at Tangle N/A #VALUE! N/A Verde River at Beeline Highway N/A #VALUE! N/A Bartlett Reservoir Saguaro Salt River Epilmnion N/A #VALUE! N/A Hypolimnion N/A #VALUE! N/A Epilimnion N/A #VALUE! N/A Epi - Duplicate N/A #VALUE! N/A Hypolimnion N/A #VALUE! N/A at Blue Point Bridge N/A #VALUE! N/A Salt River above Roosevelt N/A N/A #VALUE! N/A Roosevelt Reservoir Point 1 Roosevelt Reservoir Point 2 Apache Reservoir Point 1 Apache Reservoir Point 2 Canyon Reservoir Point 1 Canyon Reservoir Point 2 Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A Epilmnion N/A N/A N/A Hypolimnion N/A N/A N/A 6

8 Water Treatment Plants- February 5th-6th, 2017 Sample Description DOC (mg/l) UV254 (l/cm) SUVA (L/mg-m) TDN (mg/l Union Hills Inlet N/A N/A #VALUE! N/A Union Hills Treated N/A N/A #VALUE! N/A Tempe North Inlet N/A N/A #VALUE! N/A Tempe North Plant Treated N/A N/A #VALUE! N/A Tempe South Inlet N/A #VALUE! N/A Tempe South Plant Treated N/A #VALUE! N/A Greenway WTP Inlet N/A N/A #VALUE! N/A Greenway WTP Treated N/A N/A #VALUE! N/A Glendale WTP Inlet N/A N/A #VALUE! N/A Glendale WTP Treated N/A N/A #VALUE! N/A Anthem WTP Inlet N/A #VALUE! N/A Anthem WTP Treated N/A #VALUE! N/A 24th Street WTP Inlet N/A #VALUE! N/A 24th Street WTP Treated N/A N/A #VALUE! N/A Chandler WTP Inlet N/A #VALUE! N/A Chandler WTP Treated N/A #VALUE! N/A Rivers and Canals- February 5th-6th, 2017 Sample Description DOC (mg/l) UV254 (l/cm) SUVA (L/mg-m) TDN (mg/l Waddell Canal N/A #VALUE! N/A Anthem WTP Inlet N/A #VALUE! N/A Union Hills Inlet N/A N/A #VALUE! N/A CAP Salt-Gila Pumping Station (June) N/A #VALUE! N/A CAP Mesa Turnout (June) N/A #VALUE! N/A CAP Canal at Cross-connect N/A N/A #VALUE! N/A Salt Blue pt. Bridge N/A #VALUE! N/A Verde Beeline N/A #VALUE! N/A AZ Canal above CAP Cross-connect N/A #VALUE! N/A AZ Canal below CAP Cross-connect N/A #VALUE! N/A AZ Canal at Highway 87 N/A #VALUE! N/A AZ Canal at Pima Rd. N/A #VALUE! N/A AZ Canal at 56th St. N/A #VALUE! N/A AZ Canal - Central Avenue N/A #VALUE! N/A AZ Canal - Inlet to Glendale WTP N/A N/A #VALUE! N/A AZ Canal - Inlet to Greenway WTP N/A N/A #VALUE! N/A South Canal below CAP Cross-connect N/A N/A #VALUE! N/A Head of Tempe Canal N/A #VALUE! N/A 7

9 Tempe Canal - Inlet to Tempe's South Plant N/A #VALUE! N/A Head of the Consolidated Canal N/A #VALUE! N/A Middle of Consolidated Canal N/A #VALUE! N/A Chandler WTP - Inlet N/A #VALUE! N/A 8

10 Taste and Odor MIB, Geosmin and Cyclocitral are compounds naturally produced by algae in our reservoirs and canals, usually when the water is warmer and algae are growing/decaying more rapidly. They are non toxic, but detectable to consumers of water because of their earthy-musty-moldy odor. The human nose can detect these in drinking water because the compounds are semi-volatile. Since compounds are more volatile from warmer water, these tend to be more noticable in the summer and fall. The human nose can detect roughly 10 ng/l of these compounds. Our team collects samples from the water sources and raw/treated WTP samples. Table 1 - Water Treatment Plants February 6, 2017 Sample Description MIB Geosmin Union Hills Inlet ns ns Union Hills Treated ns ns Tempe North Inlet ns ns Tempe North Plant Treated ns ns Tempe South WTP <2.0 <2.0 Tempe South Plant Treated <2.0 <2.0 Anthem Inlet 2.7 <2.0 Anthem Treated 2.3 <2.0 Chandler Inlet <2.0 <2.0 Chandler Treated < Greenway WTP Inlet ns ns Greenway WTP Treated ns ns Glendale WTP Inlet ns ns Glendale WTP Treated ns ns 24th St. WTP Inlet ns ns 24th St. WTP Outlet ns ns 9

11 Table 2 - Canal Sampling February 6, 2017 System Sample Description MIB Geosmi n CAP Waddell Canal Union Hills Inlet ns ns CAP Canal at ns ns Cross-connect Salt Blue Pt <2.0 <2.0 Bridge Verde 2.4 <2.0 Beeline AZ AZ Canal above <2.0 <2.0 CAP Cross-connect Canal AZ Canal below < CAP Cross-connect AZ Canal at <2.0 <2.0 Highway 87 AZ Canal at Pima Rd. <2.0 <2.0 AZ Canal at 56th St AZ Canal - Central <2.0 <2.0 Avenue AZ Canal - Inlet to ns ns Glendale WTP Head of the <2.0 <2.0 Consolidated Canal Middle of the <2.0 <2.0 Consolidated Canal South South Canal below ns ns CAP Cross-connect Tempe Head of the Tempe <2.0 <2.0 Canal Canals Tempe Canal - Inlet to Tempe's South Plant <2.0 <2.0 Salt-Gila (Jan) <2.0 <2.0 Mesa Turnout (Jan) <2.0 <2.0 10

12 Table 3 - Reservoir Samples February 7, 2017 Sample Description Location MIB Geosmin Pleasant Eplimnion 2.3 <2.0 Pleasant Hypolimnion 5.6 <2.0 Verde Beeline 2.4 <2.0 Bartlett Reservoir Epilimnion <2.0 <2.0 Bartlett Reservoir Epi-near dock <2.0 <2.0 Bartlett Reservoir Hypolimnion <2.0 <2.0 Salt BluePt Bridge <2.0 <2.0 Saguaro Epilimnion <2.0 <2.0 Saguaro Epi - <2.0 <2.0 Duplicate Saguaro Epi-near dock <2.0 <2.0 Saguaro Hypolimnion < Havasu (Jan) <2.0 <2.0 Verde River at Tangle Creek (Jan) <2.0 <2.0 Roosevelt at Salt River Inlet ns ns Table 4 - Quarterly Sampling - February 7-8, Site Location MIB Geosmin Roosevelt Site 1A Eplimnion <2.0 <2.0 Roosevelt Site 1B Hypolimnion <2.0 <2.0 Roosevelt Site 2A Eplimnion <2.0 <2.0 11

13 Roosevelt Apache Apache Apache Apache Canyon Canyon Canyon Canyon Site 2B Hypolimnion <2.0 <2.0 Site 1A Eplimnion <2.0 <2.0 Site 1B Hypolimnion <2.0 <2.0 Site 2A Eplimnion <2.0 <2.0 Site 2B Hypolimnion <2.0 <2.0 Site 1A Eplimnion <2.0 <2.0 Site 1B Hypolimnion <2.0 <2.0 Site 2A Eplimnion <2.0 <2.0 Site 2B Hypolimnion <2.0 <2.0 12

SUMMARY.

SUMMARY. SUMMARY Regional Water Quality NEWSLETTER DATE: Report for December 2016 A Tempe, Glendale, Peoria, Chandler, Phoenix, ADEQ, CAP, SRP, Epcor NSF Central Arizona-Phoenix Long-Term Ecological Research ASU