A sewerage undertaker whose area is wholly or mainly in England must—
in the case of each nitrogen significant plant comprised in its sewerage system—
secure that, by the upgrade date, the plant will be able to meet the nitrogen nutrient pollution standard, and
on and after the upgrade date, secure that the plant meets that standard;
in the case of each phosphorus significant plant comprised in its sewerage system—
secure that, by the upgrade date, the plant will be able to meet the phosphorus nutrient pollution standard, and
on and after the upgrade date, secure that the plant meets that standard.
In carrying out the duty under subsection (1), a sewerage undertaker must consider whether nature-based solutions, technologies and facilities relating to sewerage and water could be used to meet the standard.
"Nitrogen significant plant" means a plant in England that—
discharges treated effluent into a nitrogen sensitive catchment area, and
is not an exempt plant in relation to the nitrogen nutrient pollution standard.
"Phosphorus significant plant" means a plant in England that—
discharges treated effluent into a phosphorus sensitive catchment area, and
is not an exempt plant in relation to the phosphorus nutrient pollution standard.