Water Health Educator
Issues USA: Midwest
The Great Lakes
by Emily Bremer
The Great Lakes are made up of five connected, fresh water bodies of water, Lake Heron, Superior, Michigan, Erie, and Ontario that form the largest lake group in the world . The Great Lakes play an important role in the shipping, tourism, recreational, and agricultural industries, as well as provide drinking water for 26 million people.
Over the years, as industries dependent upon The Great Lakes grew, so did the contamination of their collective waters. s, research began on the lake pollutants, particularly the effects of chemicals such as DDT, prompting, among other issues, the 1972 Great Lakes Water Quality Agreement between Canada and the U.S.
The Water Quality Agreement has reduced the amount of pollutants in the lakes significantly, such as floating debris and oil sheen.
Despite this progress, however, the Great Lakes remain contaminated today. In 2013, researchers reported finding high amounts of caffeine, prescription drugs and other chemicals in the lakes, demonstrating the significance of the human effect on watersheds. Although research is still pending on the health effects of these chemicals via lake exposure, they do pose a high risk for aquatic life.
In 1987, the Great Lakes Water Quality Agreement between the United States and Canada identified 43 areas of concern (areas too impaired to support aquatic life) in the Great Lakes Basin, 26 of which are located in the United States , with pollutants coming from both point-source and non point-source origins, including agricultural run-off from fertilizers and insecticides.
The collective pollution causes many problems for the ecosystem in the lakes, particularly by creating harmful algae blooms that disrupt the oxygen levels and in turn the populations of aquatic life. In addition, sewage contaminants like e.Coli pose a serious health risk to the people dependent on the lakes as a source for drinking water. only 2 have been delisted in recent years. However, with continued work through programs like the Great Lakes Water Quality Agreement, and aggressive regulation of the industries that cause a majority of the contamination, hopefully water quality will improve.
North Dakota, An Emerging Leader
By Jason Zheng
To further emphasis on the EPA’s Clean Water Rule (or Act), this brief will continue to highlight the flaws of the proposed legislation. The Midwest is consisted up of 12 states in the north central United States, however here in this brief we will only cover the most recent legal actions of North Dakota which prevented the Clean Water Act (CWA) from moving forward.
The EPA wanted to bring forth a rule to impose stricter water quality regulations for stream and tributaries around the United States. Chief Judge Ralph Erickson for the U.S. District Court for the District of North Dakota, blocked the EPA’s stance of redefining “waters of the United States” (WOTUS) under the Clean Water Act. The new rule is crucial because it prohibits the development on wetlands without a federal permit, apply the waters belonging to the United States. Thus ultimately the state’s (or states’) ownership of the water is nullified, giving complete ownership to the United States government.
Two court cases that revolves around the new definition of the CWA are, Solid Waste Agency of Northern Cook County (SWANCC) v. U.S. Army Corps of Engineers, 531 U.S. 159 (2001)—requires permits for the discharge of dredge of filled materials into the “waters of the United States”; and Rapanos v. United States, 547 U.S. 715 (2006)—which challenged the federal jurisdiction to regulate isolated wetlands under the CWA.
A major argument against regulating wetlands and stopping industrial dumping is that it would place a burden on the agricultural industry. In irrigated areas where irrigation structures, ditches and canals may call for the requirement of getting a permit, however in the current policies it is not required to do so.
May people have the deception that the WOTUS rule is an effort to protect drinking water, however this fact is misleading. Drinking water is regulated by the United States under the Safe Drinking Water Act, the Clean Water Act focuses on surface waters (rivers, lake, and stream to name a few). Though surface water can affect the quality of drinking water, but the CWA is not the primary protector drinking water. The “water of the United States” rule asserts federal jurisdiction over waters and wetlands.
An update of the matter of WOTUS and CWA, as of September 2, 2015, the federal court granted the states’ injunction after Erickson’s 18-page order. Attorney General Tim Fox praised the federal court for granting this request and also stated that “Today’s ruling is an important and substantive step in protecting our rights under the Tenth Amendment to manage and protect our state’s lands and resources in the manner we believe to be most fitting and effective for us”.
By Marlena Bludzien
How much water does it take to grow the food we eat daily? Most of the food we grow and irrigate in the U.S. comes from the western part of the country called High Plains. Under this area lays the largest single water source in the United States, called the High Plains Aquifer or Ogallala Aquifer. It is incredibly vital to the High Plains land. This aquifer alone supplies a very large 81% of the water used in the area. This land accounts for 27% of our Nation’s IrrigatedLand. It is a very important area for growing wheat, cotton, and corn: the basics of our daily diet.
An aquifer is a region of subsurface rock that is saturated with groundwater. An unconfined aquifer such as the Ogallala aquifer is an area of groundwater composed of permeable surface soil layer. Below the soil lies an unsaturated zone, an area where the water table has not risen to. Perhaps the most crucial part of the aquifer is the aquiclude. This element is impermeable to water and usually consist of clay rock. It traps groundwater above it creating what we know as aquifer. The primary source for the aquifer recharge is precipitation but because of the Ogallala Aquifer location in the Western U.S,, it receives little precipitation throughout the year. The water table is the natural level at which the groundwater is present. The water table can rise and fall depending on how much water is recharged to the aquifer.
The aquifer lies under parts of South Dakota, Wyoming, Nebraska, Colorado, Kansas, New Mexico, Oklahoma and Texas. The Ogallala Aquifer covers approximately 174,000 square miles. It’s massive. If the groundwater was spread over the entire 50 states it would be foot and a half deep. Nebraska is home to some of Ogallala Aquifer’s deepest water. On average the aquifer is 200 feet in depth. In parts of west-central Nebraska, the aquifer reaches as far down as 1,000 feet. However, further south in Texas, the Ogallala is most shallow ranging in depth here from 0 to 50 feet. Because of the stress placed on this resource, it is in danger of drying up.
The Ogallala Aquifer supplies agriculture industries, mining, livestock and domestic use. About ninety four percent of its total groundwater usage is for irrigation. Nebraska, Texas, and Kansas withdraw the greatest amount of water for irrigation. Nebraska uses about 46%, Texas uses 36% and Kansas 14%. With this being said, the Ogallala is facing serious problems. The root of these problems is that its depletion rate is much higher than its recharge rate. From 1940 to 1980 the aquifer’s water table declined approximately an average of 10 feet. This means that overall 329.5 cubic miles of water were removed from the aquifer over a 40-year period. An average of 21.59 millimeters of water per year are recharged back into the aquifer but this number is vastly outweighed by the amount of water being drawn out of it. An astounding 76.5 millimeters per year! In fact, the recent data shows that the aquifer’s water table has been dropping at a net rate of 56.86 millimeters per year in recent years.
As mentioned before, irrigation is the primary use of the aquifer. In the year 2000 seventeen billion gallons a day of the aquifer’s water were pumped from the ground to be used for agricultural purposes. On top of this, water from the Ogallala supplied 1.9 million people that same year with their domestic water supply. To put this in perspective, 315 million gallons per day were pumped for human use. It is important to see the magnitude of water needed for successful irrigation in this region. The bit of recharge that the Ogallala receives is due to precipitation. Overall the lack of recharge in the area further enhances the aquifer’s problem with depletion. The land has low permeability, many areas consist of thick unsaturated zones which makes it even longer for the surface water to penetrate and recharge the groundwater. The rate of evaporation is also very high due to high temperatures in the region making it even harder for the water to collect.
If the Ogallala Aquifer was to be completely drained, it would take 60,000 years for it to return to its original levels. Given the current rates of use, the aquifer can only be sustained for 15 to 250 more years depending on the area. Texas and New Mexico are facing the greatest risk of depleting their share of the Ogallala.
The depletion of the Ogallala Aquifer presents problems not only for humans but for the biodiversity in the plains region. Ogallala is also at risk of contamination due to expand in agriculture industry in the western states, and increasing amount of nutrient-rich water running off into the aquifer. There is also a threat of oil pollution from the major pipelines such as TransCanada’s Keystone XL. Any leaks or spills out of this pipeline would be disastrous to the agricultural industry in water supply in the western states.
Farmers, scientists and residents of the area are starting to see the need for a change. The Ogallala Aquifer initiative of 2011 is designed to reduce water depletion rates, keep the water quality high and bring forth more conservation and alternative methods of irrigation. For this to be accomplished different practices are being implemented. Irrigated lands are being converted to dry land. Permanent vegetation that does not require irrigation is being planted. Flood irrigation systems that are less efficient are being replaced by center pivot and subsurface drip irrigation in order to use less water. There is still hope to save this precious resource but the forces must be joined in order to conserve Ogallala’s water.