The balance of water nutrients is delicate.
While crucial, the presence of certain nutrients in excess can have negative effects on humans, animals, and the environment.
In this blog, we will explore the impacts of these nutrients when they exceed safe levels.
Table of Contents
The Main Nutrients in Water
The two main nutrients in water are typically:
- Nitrogen (N): Found as nitrate (NO3-), nitrite (NO2-), ammonia (NH3), and ammonium (NH4+).
- Phosphorus (P): Found mainly as phosphate (PO4³⁻).
Importance: N & P are important components of DNA, RNA, proteins, and ATP. This means these nutrients support everything from genetic information storage to energy production. As a result, both N & P are essential for plant growth in water.
Dangers: High N & P levels in water can trigger eutrophication, a process where water bodies become excessively nutrient-rich. This process creates algae blooms, which use up oxygen and harm aquatic life.
Controlling and monitoring the levels of these nutrients in water is essential to maintain water quality. Failure to do so puts ecosystems and public health at risk.
Algal Bloom at Lough Neagh, Northern Ireland
Water Nutrients: Impact on Humans
Toxic Algal Blooms: As mentioned, high water nutrient levels can lead to eutrophication. The excessive build-up of nutrients causes the overgrowth of algae and the formation of harmful algal blooms. Some of these algae produce toxins that can contaminate drinking water supplies. Consuming water contaminated with algal toxins can lead to various health problems, including gastrointestinal issues, skin irritation, and even neurological disorders.
Drinking Water Contamination: Aside from algal toxins, high nutrient levels can directly reduce drinking water quality. Excess water nutrients, especially nitrates, in drinking water can pose serious health risks. High nitrate levels are linked to methemoglobinemia (blue baby syndrome). This disease affects the ability of blood to carry oxygen, particularly in infants.
Water Nutrients: Impact on Animals & the Environment
Aquatic Life: We know that excessive water nutrients cause algae overgrowth. This has major consequences for animals in the water. When the algae dies and decomposes, it depletes oxygen levels in the water. Reduced oxygen harms aquatic life, leading to fish kills and biodiversity decline.
Terrestrial Ecosystems: Excess nutrients can also affect land-based ecosystems. For example, nutrient runoff from agricultural fields can contaminate nearby water bodies. This directly impacts the aquatic life. However, it also indirectly impacts terrestrial wildlife that rely on these ecosystems for food.
Habitat Destruction: Water nutrient pollution can alter ecosystems and lead to the destruction of habitats. The overgrowth of aquatic plants and algae doesn’t just harm animals. This overgrowth can also smother coral reefs and seagrass beds. As a result, nutrient pollution causes significant damage to marine ecosystems.
How Water Nutrients Reach Harmful Levels
1. Agricultural Runoff: One of the main sources of water nutrient pollution is agricultural runoff. Excess fertilisers (containing N & P) can be washed away by rainwater or irrigation. This runoff enters nearby water bodies and causes nutrient imbalances.
2. Wastewater Discharges: In urban areas, wastewater discharges from sewage treatment plants often contain high levels of nutrients.
3. Industrial Effluents: Some industries release wastewater containing water nutrients. Industrial wastewater often causes nutrient pollution in water bodies near factories.
4. Stormwater Runoff: Urban areas with impervious surfaces, such as roads and parking lots, can experience stormwater runoff. Excessive nutrient pollutants are often in this stormwater.
Conclusion for the Impact of Water Nutrients
Excessive water nutrient levels can lead to many problems – from drinking water contamination to environmental damage. Understanding how water nutrients reach harmful levels is key to mitigating these risks.
Southern Scientific plays a pivotal role in this process. By providing comprehensive water monitoring & environmental consultancy services, we help safeguard water quality.
In doing so, we help maintain the water nutrient balance, ensuring the continued vitality of our water and the life it sustains.
