Most homeowners find that groundwater protection is not only the right thing to do - it's also easy and economical. Read this booklet and keep it as a handy reference. Try some of the ideas and call some of the phone numbers for more information. Then have a glass of cool, fresh water and take pn'de in the fact that you're helping to make better homes and groundwater. Try replacing parts of your lawn with low maintenance groundcovers, shrubs and perennial flowers that require little or no fertilizer and water.
Fertilizer usually contains nitrogen, phosphate and potash.
Nitrogen is the most important lawn nutrient but it can contaminate groundwater with nitrate. Phosphate can contaminate rivers and ponds, causing excess weed growth. The chloride which is often combined with potassium in potash can contaminate groundwater. The numbers on a fertilizer bag indicate the percentages of these three plant nutrients. WIN fertilizers cost more, but they're worth it.