Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Monitoring, Assessment and TMDLs
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Nevada Water Quality
Nevada Division of Environmental Protection is responsible for conducting monitoring, assessment, reporting under CWA Sections 303(d) and 305(b), and TMDL development for the State of Nevada. More information about Nevada's programs can be found at Nevada's Division of Environmental Protection's Bureau of Water Quality Planning page or through EPA and Nevada staff.
Nevada's Integrated Report
On August 4, 2014, EPA partially approved and partially disapproved Nevada’s 2012 303(d) list of waters requiring a Total Maximum Daily Load (TMDL). EPA approved waters Nevada identified as requiring a TMDL, and disapproved the omission of one water EPA determined to be impaired due to mercury in fish tissue. EPA’s action added Topaz Lake for mercury in fish tissue.
Following a public comment period on EPA’s notice to add Topaz Lake for fish tissue, on October 23, 2014, EPA transmitted to the state the decision to include the water body-pollutant combination and a responsiveness summary addressing how public comments were considered in the final EPA decision. Provided below are the August 4, 2013 partial approval / partial disapproval letter and the October 23, 2014 letter and enclosure presenting the final decision and responsiveness summary (see EPA documents). The State’s 303(d) lists are available at the link under State Documents, below.
David Guiliano (firstname.lastname@example.org)
U.S. Environmental Protection Agency
75 Hawthorne St, WTR-2-1
San Francisco, CA 94105
- EPA’s August 2014 Partial Approval / Partial Disapproval Letter (PDF) (2 pp, 252K) and Enclosure (PDF) (10 pp, 77K), with the added waters
- EPA’s Public Notice for public comment period (PDF) (1 pp, 37K) (Comment closed 9/12/2014)
- EPA's October 2014 letter with enclosure (PDF) (8 pp, 166K) conveying the final list and response to comments
Nevada’s 2012 Section 303(d) list of waters requiring a TMDL is available in Attachment 4 of Nevada’s 2012 Water Quality Integrated Report, available at the Nevada Division of Environmental Protection web page.
TMDLs in Nevada
Information on the status of TMDLs being developed or previously developed by Nevada Division of Environmental Protection can be found at NDEP's Total Maximum Daily Loads page.
Lake Tahoe TMDL
- Lake Tahoe TMDL Submittal Letter (PDF) (2 pp, 792K)
- Final Lake Tahoe TMDL (PDF) (338 pp, 5.1MB)
- NDEP Revisions to Lake Tahoe TMDL (PDF) (2 pp, 214KB)
- Watershed Priorities in the Tahoe Basin
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