Nitrate pollution still rising

Last week, U.S. Geological Survey scientists provided an update on 30 years of water quality tests that show a continuing increase in nitrate pollution at many points on the Mississippi River and its tributaries. Overall, nitrate levels in the river increased 14 percent from 1980 through 2010. Increases were greater in the upper reaches of … Read more Nitrate pollution still rising

Nitrate taints St. Peter groundwater

A  Minnesota Public Radio report this week looked at the complicated – and costly – process the City of St. Peter uses to remove nitrate from city water. The nitrate mostly comes from fertilizers applied by farmers. The radio report says the water would be cleaner if farmers planted more alfalfa and less corn and … Read more Nitrate taints St. Peter groundwater

Nitrogen flush headed for Gulf

Last summer’s drought in the big parts of the Midwest stunted crops and left lots of nitrogen fertilizer – much of which normally would have been taken up by plants and converted to grain — in the soil of farm fields. This year’s wet spring flushed lots of that leftover nitrogen down the Mississippi River. … Read more Nitrogen flush headed for Gulf

Cover crops work, users say

Cover crops – typically grasses sowed into corn and soybean fields after the fall harvest – could reduce nitrogen losses to Minnesota streams and rivers by 10 percent if the cover crops were widely adopted by farmers across the state, a Minnesota Pollution Control Agency report estimated in late June. Read an agriculture.com report on … Read more Cover crops work, users say

Major report documents extent of Minnesota nitrate pollution

Nitrate  – much of it from fertilizers applied to farmland – pollutes many Minnesota rivers and streams and contributes to the oxygen-depleted “dead zone” in the Gulf of Mexico, a new report from the state’s Pollution Control Agency concludes. Excess nitrate is toxic to fish and the aquatic life food chain and potentially harmful to … Read more Major report documents extent of Minnesota nitrate pollution

Fertilizers pollute ground, surface waters

The Freshwater Society blog publishes a digest of important regional, national and international articles and research on water and the environment. Scan the articles here, then follow the links to read the articles in their entirety where they originally were published. Report analyzes pollution from fertilizers The Environmental Working Group has issued a 54-page report … Read more Fertilizers pollute ground, surface waters

Zebra mussels in court; water conflicts loom

The Freshwater Society blog publishes a digest of important regional, national and international articles and research on water and the environment. Scan the articles here, then follow the links to read the articles in their entirety where they originally were published. West Metro zebra mussel fight goes to court The ice went out on Christmas … Read more Zebra mussels in court; water conflicts loom

Nitrate in the Mississippi; carp DNA in St. Croix

Each week, the Freshwater Society publishes a digest of important regional, national and international articles and research on water and the environment. Scan the articles here, then follow the links to read the articles in their entirety where they originally were published. Research: Nitrate increasing in Mississippi The nitrate flowing down the Mississippi River each … Read more Nitrate in the Mississippi; carp DNA in St. Croix

USGS report documents nitrate pollution

Pollution of both surface and ground waters by two major contaminants – nitrogen and phosphorus – has failed to improve or has gotten worse since the early 1990s, a major new study by the U.S. Geological Survey reports. The new study, released Thursday, Sept. 23,  contained compelling evidence about the widespread nitrate contamination of shallow aquifers, … Read more USGS report documents nitrate pollution

USGS study find contaminants in private wells

More than one in every five private domestic wells sampled nationwide contain at least one contaminant at levels of potential health concern, according to a new study by the U.S. Geological Survey. The study was released this morning. USGS scientists sampled about 2,100 private wells between 1991 and 2004 in 48 states and found that … Read more USGS study find contaminants in private wells