Problems and ImpactsNitrates Raw wastewater originating from septic systems contains organicnitrogen (N), urea, and dissolved ammonium-N. Through a series of chemicalchanges in the septic system, ammonium leaves the system as nitrate-N. Septicsystems that are malfunctioning can cause nitrate contamination of waterresources, especially lakes, ponds, aquifers, and deep wells. Excess nitrates indrinking water can also be harmful to human health.
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