Here's how nutrient reductions are proceeding, according to the Bay Program's nutrient re-evaluation report. Point sources are facilities that discharge directly into waterways, primarily wastewater treatment plants.
Nonpoint sources are those that contribute nutrients indirectly to waterways, as a result of fertilizer, animal waste or other pollutants that run off from farms, lawns, parking lots and other land uses.
Nitrogen Point Sources
- As of 1996, nitrogen loads had been reduced by 12.6 million pounds, or by 15 percent of the point source load.
- By 2000, under present plans, nitrogen loads should be cut by a total of 22.6 million pounds, or a 28 percent reduction.
- Full implementation of the tributary strategies should reduce nitrogen discharges by 29 million pounds, or 34 percent.
- o As of 1996, actions had been taken to reduce nitrogen loads by 16 million pounds, or 7 percent.
- By 2000, nitrogen loads should be reduced by 34 million pounds, or 15 percent of the total nonpoint source load.
Phosphorus Point sources
- By 1996, phosphorus loads from wastewater treatment plants had been reduced by 5 million pounds, or 51 percent. Efforts by the year 2000 should result in a 58 percent reduction.
- Control practices in place as of 1996 were enough to reduce phosphorus runoff by more than 1 million pounds, or about 9 percent.
- By 2000, existing plans would reduce phosphorus runoff by 3 million pounds, or about 19 percent.