NingXia Region(China) Drinking Water Problem

https://scroll.in/article/828748/in-chinas-ningxia-province-water-shortage-is-so-severe-that-the-government-is-relocating-people

NingXia Region(China) Ground Water Quality

https://www.ncbi.nlm.nih.gov/pubmed/25990719

Radium in Drinking Water

http://pittsburgh.cbslocal.com/2018/01/11/radium-drinking-water-interactive-map/

USEPA 2015 Update: Drinking Water Contaminant Enforceable Standards

http://water.epa.gov/drink/contaminants/index.cfm

WHO 2011 Guidelines for Drinking-Water Quality

http://www.who.int/water_sanitation_health/publications/2011/dwq_guidelines/en/

USEPA Info. on Private Drinking Water Wells

http://water.epa.gov/drink/info/well/index.cfm

USEPA 2015 Update: Industrial Effluent Standards

http://yosemite.epa.gov/water/owrccatalog.nsf/7322259e90d060c885256f0a0055db68/42c5ec3b987d442885256b0600723d52!opendocument

USEPA 2015 Update: Constructed Wetlands

http://water.epa.gov/type/wetlands/restore/cwetlands.cfm