Nutrient Pollution Exists in Jackson Hole

What is Nutrient Pollution?

Nutrient pollution is one of America’s most widespread, costly and challenging environmental problems, and is caused by excess nitrogen and phosphorus in water. Nutrient pollution has impacted many streams, rivers, lakes, bays and coastal waters for the past several decades, resulting in serious environmental and human health issues, and impacting the economy. Climate change, population growth and increased development will exacerbate the issue of nutrient pollution through warmer waters and more nutrient loads from fertilizer, wastewater and urban land use.

Nutrient Pollution & Algae

When too much nitrogen and phosphorus enter the environment – usually from a wide range of human activities – water can become polluted. Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle. Excess algae, called algal blooms, result in a myriad of negative impacts, including:

  • Harm to water quality, food resources and habitats
  • Severely reduced or eliminated oxygen in the water, leading to illnesses and even death in fish and other aquatic life
  • Elevated toxins and bacterial growth that can make people sick if they come into contact with polluted water, consume tainted fish, or drink contaminated water.

Sources of Nutrient Pollution

Primary sources of nutrient pollution include human wastewater, landscape fertilizers, animal waste and stormwater runoff.


From sewer and septic systems.

Our sewer and septic systems are responsible for treating increasingly large quantities of waste, and these systems do not always operate properly or remove enough nitrogen and phosphorus before discharging into waterways.

Landscape Fertilizers

Excess fertilizer enters groundwater or enters surface water via runoff.

When homeowners or turfgrass professionals apply too much fertilizer on lawns, any nutrients not used by the turf infiltrates to groundwater (where it eventually discharges to rivers or streams) or is carried in runoff to the nearest body of water. There, nutrients over-feed algae, contributing to problematic algae blooms and the declining health of our lakes, rivers, and streams.

Livestock, Horses and Pets

Excess manure and pet waste contributes to nutrient pollution.

When the nitrogen and phosphorus in animal manure and pet waste are not fully utilized by plants they can infiltrate into groundwater or runoff into surface waters and negatively impact water quality.

Stormwater Runoff

Carries pollutants from the street to our waterways.

When precipitation falls on our cities and towns it runs across hard surfaces – like rooftops, sidewalks and roads – and carries pollutants, including nitrogen and phosphorus, into local waterways.

Effects of Nutrient Pollution

The effects of nutrient pollution include negative repercussions for human health, the environment and the economy. 

Human Health

Excess nutrients and harmful algal blooms create toxins and compounds in water that pose danger for human health. There are several ways that people (and pets) can be exposed to these compounds.

Direct exposure to toxic algae: Drinking, accidentally swallowing or swimming in water affected by a harmful algal bloom can cause serious health problems including:

  • Rashes
  • Stomach or liver illnesses
  • Respiratory problems
  • Neurological effects

Nitrates in drinking water: Infants are more susceptible to the health effects posed by nitrates, which can be serious and sometimes fatal.
The U.S. drinking water standard for nitrate of 10 mg/L nitrate (as nitrogen) was first set in 1962 in order to protect against infant methemoglobinemia (Blue-baby syndrome). Other health effects were not considered.
Concentrations above 4 ppm indicate contamination.



  • When algae grow in excess, they consume oxygen in the water during the process of decomposition which can cause fish kills.
  • Harmful algal blooms sometimes create toxins that are detrimental to fish and other animals.
  • Nuisance algal blooms can impact aquatic insect populations by smothering habitat.


Drinking water costs, tourism income and real estate values can all be negatively effected by water quality.

Drinking Water Costs

  • Nitrates and algal blooms in drinking water sources can drastically increase treatment costs.

Tourism losses


Real estate losses
