Water Quality Standards
Water Quality for Fresh Water Animal
| Appropriated Water Quality Criteria for Aquatic Living | Maximum Allowance in Water |

Appropriated Water Quality Criteria for Aquatic Living
No.Water Quality IndexUnitAppropriated ConcentrationRemark
1.TemperatureํC23-32Naturally Changed and not Rapid Change
2.pH 5-9Daily Change should not exceed 2.0 Unit
3.Dissolved Oxygen (DO)mg/l.Minimum 3

-

4.CO2mg/l.Maximum 30and DO sufficiency
5.Turbidity
- Transparency
- Suspended solids
cm.
mg/l.
30 - 60
Maximum 25		Secchi disc

Sources:Academic Paper from Thailand Fresh Water Fishery Institute Issue 75/2530 Item Water Quality Criteria for Fresh Water Aquatic Resources


Maximum Allowance in Water
No.Water Quality indexUnitMaximum Concentration AllowanceRemark
1.Heavy Metals
- Cadmium (Cd)
- Copper (Cu)
- Lead (Pb)
- Mercury (Hg)
- Iron (Fe)
- Zinc (Zn)		mg/l


0.001
0.02
0.05
0.0005
0.3
0.1		-
2.Organochlorine Compounds
- DDT
- Dieldrin
- Endrin
- Heptachlor		mg/l

0.5 x 10-3
0.2 x 10-2
0.01 x 10-3
0.4 x 10-3		-
3.Organophosphate Compounds
-Fenitrothion
- Malathion
- Methyl parathion
- Parathion
mg/l

0.06
0.02
0.2
0.04		-
4.Carbamate Compounds
- Carbaryl
- Carbofuran		mg/l

0.01
0.008		-
5.Herbicides
- Glyphosate
- Paraquat
- Propanil
- 2, 4-D		mg/l

4.8
0.5
0.5
45.0		-
6.NH3-Nmg/l
0.02un-ionized ammonia
7.Chlorinemg/l
0.005Total residual chlorine
8.Detergent
- Soft detergent
- Hard detergent		mg/l

0.03
0.5		Surfactant
9.Sulfidesmg/l
0.2 undissociated
hydrogen sulfide

Sources:Academic Paper from Thailand Fresh Water Fishery Institute Issue 75/2530 Item Water Quality Criteria for Fresh Water Aquatic Resources Preservation