Page 1173 - Veterinary Toxicology, Basic and Clinical Principles, 3rd Edition

Water Quality and Contaminants Chapter | 80 1105

VetBooks.ir TABLE 80.3 Water Quality Recommendations for Selected Chemicals for Aquatic Water Systems

Water System
Upper Concentration Limit (mg/L)
Freshwater Aquatic Life Freshwater Marine Aquatic Life
Wildlife

Agency Canadian US EPA US EPA Canadian US EPA a
Chemical
Arsenic 0.005 0.0125 (interim) 0.01 3 96-h
LC 50 ; 0.5
Cadmium 0.000017 (interim) 0.03 in hard water, 0.00012 0.01 3 96-h
0.004 in soft water LC 50 ; 0.01 mg/L
Calcium
Chloride
III
III
Chromium Cr : 0.0089 (interim) 0.03 Cr : 0.056 0.01 3 96-h
(interim) LC 50 ; 0.1 mg/L
VI
VI
Cr : 0.001 Cr : 0.0015
Copper 0.002 @ [CaCO 3 ] 5 0.1 is 96-h LC 50 0.01 3 96-h
0 120 mg/L LC 50 ; 0.5 mg/L
0.003 @ [CaCO 3 ] 5
120 180 mg/L
0.004@ [CaCO 3 ] 5
.180 mg/L
Fluoride 0.1 3 96-h LC 50 ;
1.5 mg/L
Hardness
Iron 0.300 0.3
Lead 0.001 @ [CaCO 3 ] 5 0.03 0.02 3 96-h
0 60 mg/L LC 50 ; 0.1 LD 50
0.002 @ [CaCO 3 ] 5
60 120 mg/L
0.004 @ [CaCO 3 ] 5
120 180 mg/L
0.007 @ [CaCO 3 ] 5
.180 mg/L,
Mercury Inorganic: 0.000026 0.0002 (total) 0.5 mg/kg in Inorganic: 0.01 3 96-h
(inorganic) fish 0.000016 (interim) LC 50 ; 0.1 mg/L
MethylHg: 0.000004 0.00005 (average) MethylHg: no
(interim). recommendation
May not protect against 0.05 mg/kg (total body
bioaccumulation burden)
Nitrate (as N)
2
(as NO ) 13 (interim) 16 (interim)
3
Nitrite (as N)
2
(as NO ) 0.06
2
Total dissolved
solids
(Continued )