Temperature Water Quality Standards Review

The Bureau of Water Quality Planning of the Nevada Division of Environmental Protection (NDEP) has embarked on an effort to review and update our temperature water quality standards for the protection of aquatic life in Nevada waters. Nevada’s current temperature criteria are not well documented and we need scientifically supported guidance as NDEP reviews temperature standards throughout the state.
Brown Trout Photo
As part of this effort, a Work Group consisting of fisheries biologists and other experts has been formed to help in the development of technical guidance to support future temperature standards review activities. While these efforts with the Working Group will not include any formal regulation adoption activities, it is hoped that the resulting products will serve as technical guidance as NDEP works to update temperature regulations across the state.

The following supporting documents have been developed to date:

White Papers

Methodology

DRAFT Methodology for Developing Thermal Tolerance Threshold for Juvenile and Adult Fish – Summer

Species Thermal Tolerance Analyses for Juvenile and Adult Fish - Summer

DRAFT Summary of Thermal Tolerance Analyses and Recommendations - Coldwater

Coldwater Fish Species

Thermal Tolorance

Recommendations

 

Chronic (°C)

Acute (°C)

Salman and Trout Family - Salmonidae

 

 

Bonneville Cutthroat Trout

17

22

Brook Trout

19*

24*

Brown Trout

17*

24*

Bull Trout (juvenile rearing)

none

12*

Bull Trout (adult foraging and migration)

none

16*

Kokanee (Sockeye) Salmon

18*

22*

Lahontan Cutthroat Trout

17

22

Mackinaw (Lake) Trout

16

21

Mountain Whitefish

17

22

Rainbow Trout

19*

24*

Redband Trout

19

24

Yellowstone Cutthroat Trout

17

22

Sculpin Family – Cottidae

 

 

Mottled Sculpin

none

26

*EPA recommendation

DRAFT Summary of Thermal Tolerance Analyses and Recommendations - Coolwater/Warmwater

Coolwater/Warmwater Fish Species

Thermal Tolorance

Recommendations

 

Chronic (°C)

Acute (°C)

Carp and Minnow Family – Cyprindae

 

 

Bonytail Chub

29

33

Common Carp

32

37

Fathead Minnow

29

32

Northern Leatherside Chub

27

29

Woundfin

26

33

Live Bearers Family – Poeciliidae

 

 

Western Mosquitofish

32

35

Northern American Catfish Family – Ictaluridae

 

 

Brown Bullhead

30

33

Channel Catfish

32*

35*

White Catfish

32

None

Perch Family – Percidae

 

 

Walleye

25*

30

Yellow Perch

29*

30

Sucker Family – Catostomidae

 

 

Flannelmouth Sucker

29

32

Mountain Sucker

26

28

Razorback Sucker

29

33

Sunfish Family – Centrarchidae

 

 

Black Crappie

27*

32

Bluegill Sunfish

32*

35*

Green Sunfish

31

34

Largemouth Bass

32*

34*

Pumpkinseed Sunfish

31

33

Redear Sunfish

29

31

Smallmouth Bass

29*

31

Spotted Bass

32

None

White Crappie

28*

31

Temperate Bass Family – Moronidae

 

 

Striped Bass

30

32

White Bass

30

31

Wiper

30

31

*EPA recommendation

Newsletter Signup: Water Pollution

Success! Thank you for signing up.