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Public Water Systems (PWSs) that use surface water (SW) or groundwater under the direct influence of surface water (GWUDI) as source water must sample at a Source Water (SR) intake, Entry Points to the Distribution System (EPTDS), and Stage 2 Disinfection Byproduct Rule (DBPR) location points for:

Source Water (SR):

  • Total Organic Carbon by SM 5310B
  • Bromide by EPA 300.0

Entry Point to the Distribution System (EPTDS):

  • Total Microcystins by ADDA ELISA EPA 546
  • 7 Microcystins by EPA 544
  • Anatoxin-a & Cylindrospermopsin by EPA 545
  • 2 Metals: Germanium & Manganese by EPA 200.8
  • 9 Pesticides and Pesticide Byproducts by EPA 525.3
  • 3 Alcohols by EPA 541
  • 3 Semi-Volatile Compounds by EPA 530

Stage 2 Disinfection Byproduct Rule (DBPR) location:

  • 3 Haloacetic Compounds by EPA 552.3

Public Water Systems (PWSs) that use groundwater (GW) as source water must sample a Source Water (SR) intake, Entry Points to the Distribution System (EPTDS), and Distribution System with Maximum Residence Time (DSMRT) and/ or Stage 2 Disinfection Byproduct Rule (DBPR) location points for:

Source Water (SR):

  • Total Organic Carbon by SM 5310B
  • Bromide by EPA 300.0

Entry Point to the Distribution System (EPTDS):

  • 2 Metals: Germanium & Manganese by EPA 200.8
  • 9 Pesticides and Pesticide Byproducts by EPA 525.3
  • 3 Alcohols by EPA 541
  • 3 Semi-Volatile Compounds by EPA 530

Stage 2 Disinfection Byproduct Rule (DBPR) location:

  • 3 Haloacetic Compounds by EPA 552.3

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