“..in the St. Lucie estuary, about half the sea grass, which is a food source for many marine animals, died off during last year’s algae blooms. Among humans who’ve been exposed to the algae, there has been an increase in antibiotic-resistant staph infections. Florida’s governor has declared a state of emergency in four counties,” according to Janice Kaspersen, editor of Stormwater: The Journal for Surface Water Quality Professionals.
Fertilizer in water runoff is boosting the growth of blue-green algae and hurting more than Florida’s $109 billion a year tourist industry. Cyanobacteria flourish with phosphorus and nitrogen, primary ingredients in fertilizers. The fertilizer boosts growth that create large algae blooms during summer and fall that deplete oxygen and diminish sunlight in the water. The bacteria not only affect aquatic life but also cause beach closures for health safety.
Fertilizer is one of the largest pollutants of stormwater runoff in urban areas. Please use fertilizers “sparingly and caringly” – apply according to the directions, when wind is still, and rain is not in the immediate forecast. You’ll be protecting more than just your plants.
Photograph: Toxic blue-green algae bloom in Klamath River in California taken by David McLain for National Geographic.
Cross-connections are actual or potential connections between safe drinking water (potable) supply and a source of contamination or pollution. The submerged hoses in the photos illustrate a direct cross connection between non-potable water and your drinking water.
A loss of pressure like a water main break or system repair in the public water system or running too many in-house water sources at once (think shower, washer, dishwasher, and sprinkler system all at the same time) can cause backsiphongage. This loss of pressure creates a siphon effect in the plumbing system which can draw water out of a sink, bucket, or pool and back into your water or public water system.
Cross-connections must be properly protected or eliminated to protect the city’s drinking water supply from backsiphonage or backflow. In this case, either remove the hoses from the pool or barrel or install a hose connection vacuum breaker on the faucet.
Amidst the activity, we ask your help in protecting our water quality and MS4 with appropriate fertilizer application. Fertilizer in water causes large algae blooms, hypoxic (dead) zones in water as it decays, and can be toxic to water supply systems. These consequences are easy to prevent with proper application.
1. Apply during calm dry weather to prevent spread into unwanted areas.
2. Apply as directed – excessive lawn feeding contributes to ground water contamination.
3. Sweep fertilizer back on the grass if it falls on the sidewalk or other impervious surface to keep it out of the storm sewer.
4. Consider grass clippings or compost as natural alternatives.
Minimum Control Measure (MCM) #6 of the Stormwater Management Plan
The purpose of this MCM is to minimize the effect of the municipality’s efforts to the contribution of stormwater pollutants into receiving waters of the state. Operations have been identified that have the greatest likelihood to cause pollution to stormwater runoff. The municipal employees, the facilitators of those operations, are educated and trained in standard operation procedures for reducing pollutants from entering the storm sewer system. Actions that are performed are noted on the City of Kearney’s website, in the Smart Maps link, or by clicking here.
If there is a layer of salt remaining on the driveway or sidewalk after the ice melts, too much salt got sprinkled. If you find excess sand or salt, sweep it up and throw it away so that it is not washed into the storm sewer.
One teaspoon of salt is enough to contaminate five gallons of water forever. Salts, like the de-icers we use in winter, stay in water without settling out contaminating and damaging the North Platte River and freshwater lakes where we fish.