Home › CFR › Title 40 › Part 44140 CFR Part 441 — Dental Office Point Source Category§ 441.10— Applicability.§ 441.20— General definitions.§ 441.30— Pretreatment standards for existing sources (PSES).§ 441.40— Pretreatment standards for new sources (PSNS).§ 441.50— Reporting and recordkeeping requirements.