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Overview of Water Quality in Copano
Bay WatershedKevin Wagner, PhD
Texas Water Resources Institute
Set Goals and Water Quality Standards (WQS)
Conduct Monitoring
Meeting WQS? Yes
Apply Antidegradati
on
No303(d
)
Develop Strategies and Control (TMDL,
WPP, Evaluate Standards)
Implement Strategies
Overview of Water Quality Management
Water Body Uses Protected in Texas
• Recreation• Domestic Water Supply• Aquatic Life• Fish Consumption• General Use• Oyster Harvesting
Water Quality Assessment Results
• Mission River Tidalo Aquatic Life Use = No concern / fully supportingo General Use = No concern / fully supportingo Recreation Use = Not supporting (bacteria levels exceed state
standards)
• Mission River above Tidalo Aquatic Life, Recreation & General Use = No concern / fully supporting
• Aransas River Tidalo Aquatic Life Use = No concern / fully supportingo General Use = Currently supporting but nutrient concern (PO4)o Recreation Use = Not supporting (bacteria levels exceed state
standards)
• Aransas River above Tidalo Aquatic Life Use = Currently supporting but dissolved oxygen concerno General Use = Currently supporting but nutrient concern (PO4, NO3, TP)o Recreation Use = No concern / fully supporting
Water Quality Assessment Results,
continued• Aransas Creek
o Aquatic Life Use = Currently supporting, but dissolved oxygen concerno Recreation Use = Not supporting (bacteria levels exceed state
standards)
• Copano Bayo Aquatic Life Use = No concern / fully supportingo General Use = No concern / fully supportingo Recreation Use = Fully supportingo Oyster Harvest = Fully supporting
• Mission Bay/Aransas River Arm, Port Bay & Eastern shorelineo Oyster Harvest = Not supporting (bacteria levels exceed state
standards)
Monitoring Procedures
• Surface Water Quality Monitoring Procedures to be followed if data is used for assessment
• http://www.tceq.texas.gov/publications/rg/rg-415/index.htmlo Chapter 2 – General Monitoring Guidelineso Chapter 4 – Collecting and Analyzing Bacteriological Sampleso Chapter 5 – Collecting Water Sampleso Chapter 9 – Required Equipment and Spare Partso Chapter 10 – Quality Assurance and Quality Control
Map of Monitoring Sites
Station 12943 - Mission River at FM 2678 (Tidal
Stream)
Station Parameter N Min Max N > Std % > Std Median Geomean12943 Entero 28 8 4600 19 68% 72 68
Apr-01Sep-02
Jan-04May-05
Oct-06Feb-08
Jul-09
0
100
200
300
400
500
600
700
800
900
1000
12943 - Enterococcus (GM 68)
cfu
/100m
L
Station 12947/8 - Aransas River Tidal at US 77 (Tidal
Stream)
Station Parameter N Min Max N > Std % > Std Median Geomean129478 Entero 28 1 3400 16 57% 49.5 66
Aug-04Feb-05
Sep-05Mar-06
Oct-06Apr-07
Nov-07Jun-08
Dec-08Jul-09
0
100
200
300
400
500
600
700
800
900
1000
12947/12948 - Enterococcus (GM 66)
cfu
/100m
L
Station 12945 - Copano Bay at FM
136Station Parameter N Min Max N > Std % > Std Median12945 Fecal 18 1 400 13 72 23
Jul-98Dec-99
Apr-01Sep-02
Jan-04May-05
Oct-06Feb-08
Jul-09
0
50
100
150
200
250
300
350
400
12945 - Fecal Coliform (Median 23)
cfu
/100m
L
Questions?Kevin Wagner, PhDTexas Water Resources [email protected]
Allen BertholdTexas Water Resources [email protected]