Editing Utah Lake (section)

===Pollution===
In 1948, a study showed Utah Lake was being seriously polluted. As a result, Utah County cities decided to plan how and where to build [[sewage treatment]] plants instead of dumping raw [[sewage]] into the lake.<ref>{{Citation | url=https://news.google.com/newspapers?id=Ro8xAAAAIBAJ&pg=5605,4234737 | title=Probe Slated In Pollution Of Utah Lake | newspaper=Deseret News | location=Salt Lake City | date=July 21, 1948 | access-date=April 9, 2010}}</ref> By 1954, many cities had constructed sewage treatment plants, but Provo's was still under construction.<ref>{{Citation | url=https://news.google.com/newspapers?id=oxMwAAAAIBAJ&pg=2387,3660712 | title=Storage Project, Sewage Disposal Would Aid The Future Of Utah Lake | newspaper=Deseret News | location=Salt Lake City | date=May 20, 1954 | access-date=April 9, 2010}}</ref>  Raw sewage was still getting into the lake by 1967.<ref>{{Citation | url=https://news.google.com/newspapers?id=D44xAAAAIBAJ&pg=7039,597545 | title=Sewage Fouls Utah Lake | newspaper=Deseret News | location=Salt Lake City | date=November 2, 1967 | access-date=April 9, 2010}}</ref>

In the State of Utah, the [[Utah Division of Water Quality]] and Utah Division of Drinking Water are responsible for the management and regulation of water quality. Lakes, rivers, and streams that exceed the standard levels are then placed on the DEQ 303d list in accordance with the [[Clean Water Act]]. The Act requires states to identify impaired water bodies every two years and develop a [[total maximum daily load]] (TMDL) for pollutants that a body of water can assimilate without causing the water body to exceed the water quality standards.<ref>{{Citation | url=http://www.waterquality.utah.gov/TMDL/ | title=Total Maximum Daily Loads (TMDL) | publisher=Utah Division of Water Quality | access-date=April 1, 2010 | archive-url=https://web.archive.org/web/20100630091853/http://www.waterquality.utah.gov/TMDL/ | archive-date=June 30, 2010 | url-status=dead | df=mdy-all }}</ref>  Utah Lake was originally put on Utah's 2000 and 2004 303d list for phosphorus and total dissolved solids (TDS) exceeding recommend values.  High levels of phosphorus can cause high levels of nuisance algae growth, low dissolved oxygen, and eleTDS tells about the concentration of mineral salts in the water, which can cause problems to agriculture and culinary water supplies.<ref>{{Harvnb|Utah_Lake_TMDL|2007|pp=5–6}}</ref> Excess levels of phosphorus come from multiple sources, but namely the wastewater treatment plants, are extremely concerning when it comes to Utah Lake management because high levels can trigger [[harmful algal blooms]] and [[eutrophication]]<ref name="Descy, J.P. pp. 129-138">Descy, J.P. et al. Identifying the factors determining blooms of cyanobacteria in a set of shallow lakes. Ecol. Informatics, vol. 34, pp. 129-138, 2016</ref> There is some discussion as to how much of the phosphorus is the result of anthropogenic causes and how much is the result of historic phosphorus stored in the lake sediment.<ref>Abu-Hmeidan, Hani Yousef, Gustavious P. Williams, and A. Woodruff Miller. "Characterizing Total Phosphorus in Current and Geologic Utah Lake Sediments: Implications for Water Quality Management Issues." Hydrology 5, no. 1 (March 2018): 8. https://doi.org/10.3390/hydrology5010008.</ref>

Krissy Wilson of Utah's Division of Wildlife Resources stated in 2010 that water quality is now improving, with greater flows of water, among other things, contributing to the improvement. However, the presence and activity of carp, which stir up solids in the water, makes it difficult to appreciate the improvement without conducting scientific measurements.<ref name="DN Save the Lake">{{cite news | last =Haddock | first =Marc | title = Save the June sucker, save Utah Lake? | newspaper =Deseret News | date =September 26, 2010 | url =http://www.deseretnews.com/article/700068672/Save-the-June-sucker-save-Utah-Lake.html | archive-url =https://web.archive.org/web/20100928021559/http://www.deseretnews.com/article/700068672/Save-the-June-sucker-save-Utah-Lake.html | url-status =dead | archive-date =September 28, 2010 | access-date =November 26, 2012}}</ref>