National Environmental (Ambient Water Quality) Regulations, No. 01 of 2019

I fldgi ( ^I& fPoh - YS% ,xld m%cd;dka;s%l iudcjd§ ckrcfha w;s úfYI .eiÜ m;%h - 2019'11'05 PART I : SEC. (I) - GAZETTE EXTRAORDINARY OF THE DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA - 05.11.2019 1A w;s úfYI wxl 2148$20 - 2019 fkdjeïn¾ ui 05 jeks wÕyrejdod - 2019'11'05 No. 2148/20 - TUESDAY, NOVEMBER 05, 2019 EXTRAORDINARY The Gazette of the Democratic Socialist Republic of Sri Lanka (Published by Authority) PART I : SECTION (I) — GENERAL Government Notifications Y%S ,xld m%cd;dka;%sl iudcjd§ ckrcfha .eiÜ m;%h L.D.B 4/81(XI) NATIONAL ENVIRONMENTAL ACT NO. 47 OF 1980 REGULATIONS made by the President under Section 32 of the National Environmental Act, No. 47 of 1980, read with Sections 23G of that Act and Section 51 of the Nineteenth Amendment to the Constitution of the Democratic Socialist Republic of Sri Lanka. MAITHRIPALA SIRISENA, President. Colombo, 04th November, 2019. Regulations 1. These Regulations may be cited as the National Environmental (Ambient Water Quality) Regulations, No. 01 of 2019. 2. No person shall discharge, deposit or emit any pollutant into the inland surface waters to exceed the Ambient Water Quality Standards (hereinafter referred to as the “Standards”) in relation to the categories specified in the Schedule hereto. 3. The Authority shall be responsible for the maintenance of the quality of inland surface waters in order to ensure compliance with the Standards specified in the Schedule hereto. 4. The Authority shall issue directives to any local authority to take appropriate measures to comply with the Standards specified in the Schedule hereto. This Gazette Extraordinary can be downloaded from www.documents.gov.lk 1A - PG 4738— 2017 (11/2019) I fldgi ( ^I& fPoh - YS% ,xld m%cd;dka;s%l iudcjd§ ckrcfha w;s úfYI .eiÜ m;%h - 2019'11'05 PART I : SEC. (I) - GAZETTE EXTRAORDINARY OF THE DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA - 05.11.2019 2A 5. In these regulations “Authority” means the Central Environmental Authority established under the National Environmental Act, No. 47 of 1980 ; “general treatment” means treatment of water using coagulation, flocculation, clarification and filtration followed by disinfection ; “Inland surface water” means any standing or flowing water on the surface of the land extending up to the boundary of the coastal water ; “person” includes a body of persons whether incorporated or unincorporated ; and “simple treatment” means simple filtration and boiled at 1000 C SCHEDULE AMBIENT WATER QUALITY STANDARDS The Categories referred to below Category A shall be water that requires simple treatment, for drinking ; Category B shall be bathing and contact recreational water ; Category C shall be water sutiable for aquatic life ; Category D shall be water source that require to undergo general treatment process, for drinking ; Category E shall be water suitable for irrigation and agricultural activities ; Category F shall be water with minimum quality but does not fall into categories A to E. I fldgi ( ^I& fPoh - YS% ,xld m%cd;dka;s%l iudcjd§ ckrcfha w;s úfYI .eiÜ m;%h - 2019'11'05 PART I : SEC. (I) - GAZETTE EXTRAORDINARY OF THE DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA - 05.11.2019 3A No Parameter Unit Category A Category B Category C Category D Category E Category F 1 Colour Pt 20 - - 100 - mg/l, max 2 Electrical µS/cm, max - - - - 700 Conductivity 3 Turbidty NTU, max 5 - - - - 4 TSS mg/l, max 25 - 40 1,500 2,100 5 Total Hardness mg/l 250 des - - - - (as CaCO3) 600 max 6 pH - 6.0-8.5 6.0-9.0 6.0-8.5 6.0-9.0 6.0-8.5 5.5-9.0 7 DO at 250 C mg/l, minimum 6 5 5 4 3 3 8 BOD5 at 20 0 C mg/l, max 3 4 4 5 12 15 9 COD mg/l, max 10 10 15 30 - 40 10 NO3 -N mg/l, max 10 10 10 10 - 10 NH3-N - pH<7.5 - - 0.94 - - 9.1 11 7.5 < p H < 8.5 mg/l, max - - 0.59 - - 4.9 8.5 < pH 0.22 - - 1.6 12. PO 4- P mg/l, max 0.7 0.7 0.4 0.7 - 13. Choride (CI) mg/l, max 250 - - 250 600 14. CN mg/l, max 0.05 0.05 0.05 0.05 0.05 0.05 15. F mg/l, max 1.5 - - 1.5 - 16. SO4 2– mg/l, max 250 - - 250 1,000 17. Cd, total µg/l, max 5 - 5 5 - 5 18. Cr, total µg/l, max 50 - 20 50 - 50 19. Cu, total µg/l, max - - 100 - - 100 20. Fe,total µg/l 300des - - 2,000 - 1,000 max 21. Pb,total Hardness<120 µg/l, max 50 - 2 50 - 120<Hardness 3 <180 180<Hardness 4 22. Mn, total µg/l, max 1,000 1,000 1,000 1,000 1,000 1,000 23. Hg, total µg/l, max 1 1 1 1 2 2 24. Ni,total µg/l, max 70 100 100 100 200 100 25. Se,total µg/l, max 10 10 5 10 - G en er al N ut ri en t M et al O th er I fldgi ( ^I& fPoh - YS% ,xld m%cd;dka;s%l iudcjd§ ckrcfha w;s úfYI .eiÜ m;%h - 2019'11'05 PART I : SEC. (I) - GAZETTE EXTRAORDINARY OF THE DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA - 05.11.2019 4A 26. Zn,total µg/l, max 1,000 - 1,000 1,000 2,000 24,000 27. B,total µg/l, max - - - - 500 28. As,total µg/l, max 50 50 50 50 50 50 29. Al,total µg/l, max 200 - - - 5,000 5,000 30. Phenolic µg/l, max 2 5 2 5 5 5 compounds 31. Oil/Grease µg/l, max 100 - 100 100 - 300 32. Anionic µg/l, max 1,000 1,000 1,000 1,000 1,000 1,000 surfactants as MBAS 33. MCPA µg/l, max 2 - - 20 - 34. Pendimethalin µg/l, max 2 - - 20 - 35. Total Coliform MPN/100ml, 10,000 10,000 - 10,000 - max 36. Fecal Coliform MPN/100ml 500 des 500 des - - - 1000 max 1000 max In this table “des” means desirable ; and “max” means maximum 11 - 1308 No Parameter Unit Category A Category B Category C Category D Category E Category F PRINTED AT THE DEPARTMENT OF GOVERNMENT PRINTING, SRI LANKA. M et al O rg an ic M ic ro P ol lu ta nt M ic ro O rg an is m