2025 Nelsen Corporation Catalog - Catalog - Page 425
National Primary Drinking Water Regulations 17
Primary (Health-Related) Inorganic Contaminants
MCLG+
MCL+
Chromium (organic
complexes)
Copper
Cyanide
Fluoride
Treatment Methods
Activated Carbon
1.3
1.3 (action level)
0.2
0.2
4.0
4.0
Corrosion Control
Reverse Osmosis
pH Adjustment
Distillation
Polyphosphate
Silicate Feed
Electrodialysis
Cation Exchange (20% - 90%)
Chemical Oxidation
Anion Exchange
Distillation
Electrodialysis
Activated Alumina
Bone Char
Reverse Osmosis
Distillation
Electrodialysis
Granular Activated
Carbon
Cation Exchange (20% - 90%)
Lead
Mercury (total)
zero
0.015 (action level)
0.002
0.002
Electrodialysis
Coagulation/Filtration
Distillation
Submicron Filtration/Activated Carbon
Reverse Osmosis
Reverse Osmosis
Distillation
Anion Exchange
Submicron Filtration/Activated Carbon
Mercury (+2)
Reverse Osmosis
0.002 (total mercury) Cation Exchange (20% - 90%)
0.002
Reverse Osmosis
Distillation
Electrodialysis
Anion Exchange
Mercury (HgCl 3 -1)
Distillation
Activated Carbon
Reverse Osmosis
Distillation
Cation Exchange
Reverse Osmosis
Distillation
Electrodialysis
Distillation
Electrodialysis
Mercury (organic
complexes)
Nickel
0.1
0.1
Nitrate plus nitrate
(as nitrogen)
10
10
Nitrite (as nitrogen)
1
1
Selenium (total)
0.05
0.05
Selenium (+4)
0.05 (total
selenium)
0.05
Selenium (+6)
Reverse Osmosis
0.05
Electrodialysis
Anion Exchange
Reverse Osmosis (sensitive to pressure)
Chemical Oxidation/Disinfection
Reverse Osmosis
0.05
Sulfate
250 (P)*
250 (P)*
Thallium
0.0005
0.002
Anion Exchange
Distillation
Electrodialysis
Coagulation/Filtration
Electrodialysis
Distillation
Anion Exchange
Activated Alumina
Reverse Osmosis
Submicron Filtration/Activated Carbon
Ultrafiltration
Anion Exchange
Reverse Osmosis
Activated Alumina
Distillation
Electrodialysis
Anion Exchange
Reverse Osmosis
Distillation
Activated Alumina
Distillation
Electrodialysis
Cation Exchange
(P)* = Proposed Standard
MCLG+ = Maximum Containment Level Goal established at the level at which no known or anticipated adverse effects on the health of persons occur and
which allows an adequate margin of safety; expressed per liter unless otherwise specified.
MCL+ = Maximum Containment Level established as close to the MCLG as feasible taking into consideration costs and treatment
techniques applicable at public water systems; expressed in milligrams per liter unless otherwise specified.
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