Editing Turbidity (section)

===Ambient water standards===
====United States====
The US [[United States Environmental Protection Agency|Environmental Protection Agency]] (EPA) has published water quality criteria for turbidity.<ref>{{cite report |title=Quality Criteria for Water |url=https://www.epa.gov/sites/default/files/2018-10/documents/quality-criteria-water-1986.pdf |date=1986 |publisher=EPA |id=EPA 440/5-86-001. (Commonly known as the "Gold Book.")}}</ref> These criteria are scientific assessments of the effects of turbidity, which are used by states to develop [[Clean Water Act#Water Quality Standards Program|water quality standards]] for water bodies. (States may also publish their own criteria.) Some states have [[Promulgation|promulgated]] water quality standards for turbidity, including:
* [[Louisiana]]: 25, 50 or 150 NTU, or background plus 10 percent, depending on the water body.<ref>Louisiana Department of Environmental Quality. Baton Rouge, Louisiana.[http://epa.gov/waterscience/standards/wqslibrary/la/la_6_wqs.pdf "Surface Water Quality Standards."] ''Louisiana Administrative Code (LAC).'' Title 33, Part IX, Chapter 11. August 6, 2007.</ref>
* [[Vermont]]: 10 NTU or 25 NTU, depending on water body classification.<ref>Vermont Water Resources Board. Montpelier, Vermont. [http://www.nrb.state.vt.us/wrp/publications/wqs.pdf "Vermont Water Quality Standards."] {{webarchive|url=https://web.archive.org/web/20131231093748/http://www.nrb.state.vt.us/wrp/publications/wqs.pdf |date=2013-12-31 }} January 25, 2006.</ref>
* [[Washington (state)|Washington]]: 5 NTU over background (when background is 50 NTU or less), or 10 percent increase when background is over 50 NTU.<ref>Washington Department of Ecology. Olympia, Washington.[http://www.epa.gov/waterscience/standards/wqslibrary/wa/wa_10_chapter173-201a.pdf "Water Quality Standards for Surface Waters of the State of Washington."] ''Washington Administrative Code (WAC).'' Chapter 173-201A. November 18, 1997.</ref>