INFORMATION

2026-09-19 12:28:00
Thailand PRTR Act, drafted and public consultation until September 30th

A public consultation for the enactment of the new “PRTR (Pollutant Release and Transfer Register) Act,” which is a prerequisite for OECD membership, is open from August 10 to September 30, 2026, at the following website: https://ethics.parliament.go.th/section77/survey_detail.php?id=614　　.


1. Key Points of the Draft PRTR Act (Basic Law)　　

Covered Facilities

  • Facilities (e.g., factories) that manufacture, possess, release into the environment, or transfer designated “target pollutants and chemicals” in quantities exceeding specified thresholds　　. Note that the specific pollutants and chemicals are not yet defined in this draft.

Reporting Obligations　　

  • Each covered facility must report the manufactured and possessed quantities of target substances, their release into the environment (air, water, soil, etc.), and their transfer as waste or wastewater. These reports must be submitted to the Pollution Control Department (PCD) under the Ministry of Natural Resources and Environment at least once a year.

Public Disclosure　　

  • The collected data—including release and transfer volumes, facility locations, and business types—will be compiled into a database. Citizens will have easy and free access to this database.

Protection of Trade Secrets　　

  • If disclosing specific chemical names or possessed quantities would cause commercial disadvantage, businesses can file a request for non-disclosure citing “trade secrets”. If approved, a generic “chemical group name” can be used in place of the specific substance name for public disclosure.

Penalties　　

Failure to fulfill reporting obligations or comply with corrective orders will result in an administrative fine of 200,000 to 1,000,000 THB, with an additional maximum daily fine of 50,000 THB while the violation continues.

  • Administrative Penalties: Failure to report or comply with regulatory orders carries a fine of 200,000 to 1,000,000 THB, plus an additional fine of up to 50,000 THB per day until compliance is achieved.
  • Criminal Penalties: Submitting false information or concealing facts is punishable by imprisonment for up to 2 years, a fine of 500,000 to 5,000,000 THB, or both. In cases of corporate violations, directors or managers who issued the instructions are also subject to punishment.


2. Impact on Chemical Handling Businesses (Factories)　　

Increased Compliance and Operational Costs　　

  • Businesses will need to establish systems for accurately measuring, calculating, and reporting release and transfer volumes, conduct testing and registration, and assign dedicated staff. This is expected to significantly increase administrative burdens and operational costs.

Reputation Risks from Public Disclosure　　

  • Because emission data will be publicly available, environmental scrutiny from local residents and NGOs will intensify.
  • High emission levels carry the risk of damaging the corporate image and provoking community backlash, necessitating strict accountability regarding environmental initiatives.

Strict Obligations for Intellectual Property Protection　　

  • Companies must carefully navigate the balance between public disclosure and maintaining corporate secrets.
  • To prevent the leakage of highly confidential chemical information (such as product formulations), companies must proactively file for “trade secret” protection and establish robust internal governance structures to substantiate these claims.

3. Pending Clarifications (Unconfirmed Matters)　　

Target Pollutants　　

  • The current draft does not explicitly list the specific pollutants and chemicals to be targeted.
  • It only defines the “criteria (properties)” for targeted substances, which include carcinogens, mutagens, reproductive toxicants, chronic toxicants, substances harmful to ecosystems, ozone-depleting substances, and persistent organic pollutants (POPs).
  • The specific substance lists are expected to be clarified in future notifications from the Ministry of Natural Resources and Environment.

Definition of Target Facilities　　

  • The exact definition of covered facilities is not clarified in the current draft.
  • This is also expected to be detailed in future Ministry notifications.


4. Implementation Timeline　　

  • In principle, the act will take effect on the day following its publication in the Royal Gazette.
  • Provisions regarding non-point sources (mobile sources) will take effect two years after publication.


5. Transitional Measures　　

  • The draft stipulates that within five years of the law’s enforcement, the application of designated areas will be expanded to cover all regions nationwide.


Potential Target Pollutants and Chemicals (Historical Reference)

The target substances from the PRTR pilot project—conducted jointly by the Japan International Cooperation Agency (JICA), the Ministry of Industry, and the Ministry of Natural Resources and Environment, and in which we were also involved—are shown in Table 1.

Please contact us if you need the rationale behind selecting these chemical substances through the Inquiry site.

https://hstecheng.com/contact

 

 

Table 1: PRTR substances list in the past
No. Name of Chemical substance Molecula Formula CAS No.
1 Acetaldehyde CH3CHO 75-07-0
2 Acetone C3H6O 67-64-1
3 Acrylamide C3H5NO 6-1-1979
4 Acrylic Acid C3H4O2 1-6-1798
5 Acrylonitrile C3H3N 107-13-1
6 Ametryn C9H17N5S 834-12-8
7 Antimony and its compunds NA 1309-64-4
7 Antimony trisulfide NA 1345-04-6
8 Arsenic and its compounds NA 7440-38-2
8 Arsenobetaine and other organic arsenic compounds NA 64436-13-1
8 Dimethylarsenic acid NA 75-60-5
9 Atrazine C8H14ClN5 1912-24-9
10 Benzene C6H6 71-43-2
11 Benzyl Chloride C7H7Cl 100-44-7
12 Bis(2-ethylhexyl)phthalate C24H38O4 117-81-7
13 Bisphenol A C15H16O2 5-7-1980
14 Boron and its compounds NA NA
15 1-Bromo-2-chloroethane, CH2BrCl 107-04-0
16 BUTACHLOR C17H26ClNO2 23184-66-9
17 Butadiene,1,3- C4H6 106-99-0
18 Cadmium and its compounds NA 7440-43-9
19 Captan C9H8Cl3NO2S 133-06-2
20 Carbon Disulfide CS2 75-15-0
21 Chloroacetaldehyde, 2- C2H3ClO 107-20-0
22 Chloroacetic Acid C2H3ClO2 11-8-1979
23 Chloroform (trichloromethane) CHCl3 67-66-3
24 Chlorothalonil C8Cl4N2 1897-45-6
25 Chlorpyrifos C9H11Cl3NO3PS 2921-88-2
26 Chromium and its componds Cr NA
26 Chromium (III) compounds NA 16065-83-1
26 Chromium (VI) compounds NA 18540-29-9
26 Chromium, metallic NA 7440-47-3
27 Copper and soluble salts Cu NA
27 Copper 8-hydroxyquinoline NA 10380-28-6
28 Cyclohexanone C6H10O 108-94-1
29 D-BUTOTYL,2,4- C14H18Cl2O4 1929-73-3
30 D-BUTYL,2,4- C12H14Cl2O3 94-80-4
31 D-DIMETHYLAMMONIUM ,2, 4- C10H13Cl2NO3 2008-39-1
32 DIALIFOS(DIALIFOR) C14H17ClNO4PS2 10311-84-9
33 Dichlorobenzene, 1,4- C6H4Cl2 106-46-7
34 Dichloroethane, 1,2- C2H4Cl2 107-06-2
35 Dichlorophenoxy Acetic Acid, 2,4- C8H6Cl2O3 94-75-7
36 Dichlorvos C4H7Cl2O4P 62-73-7
37 Diethylene Glycol Monobutyl Ether C8H18O3 112-34-5
38 DITHIOPYR C15H16F5NO2S2 97886-45-8
39 Epichlorohydrin C3H5ClO 106-89-8
40 Ethyl Acetate C4H8O2 141-78-6
41 Ethyl Acrylate C5H8O2 140-88-5
42 Ethylene Glycol C2H6O2 107-21-1
43 Ethylene Glycol Monobutyl Ether C6H14O2 111-76-2
44 Ethylene Oxide C2H4O 75-21-8
45 Formaldehyde CH2O 50-00-0
46 Formic Acid CH2O2 64-18-6
47 Furfural C5H4O2 1-1-1998
48 GLYPHOSATE-ISOPROPYLAMMONIUM C6H17N2O5P 38641-94-0
49 Hexachlorocyclohexane C6H6Cl6 319-86-8
50 Hexane, N- C6H14 110-54-3
51 Hexanedioic Acid C6H10O4 124-04-9
52 Hydrogen Fluoride HF 7664-39-3
53 Hydroquinone C6H6O2 123-31-9
54 IMAZAQUIN-AMMONIUM C17H20N4O3 81335-47-9
55 Isobutyl Alcohol C4H10O 78-83-1
56 Isophorone - 78-59-1
57 Isopropyl alcohol C3H8O 67-63-0
58 Lead and Compounds Pb 7439-92-1
59 Maleic Anhydride C4H2O3 108-31-6
60 Managenses and its compounds NA NA
61 Methanol CH4O 67-56-1
62 (p-METHOXYPHENYL)-2-METHYL-1,3- PROPANEDIOL-METHYLENE ETHER ,1- - 5689-72-5
63 Methyl Acetate C3H6O2 79-20-9
64 Methyl Acrylate C4H6O2 96-33-3
65 Methyl Ethyl Ketone (2-Butanone) C4H8O 78-93-3
66 Methyl Isobutyl Ketone (4-methyl-2-pentanone) C6H12O 108-10-1
67 Methyl Methacrylate C5H8O2 80-62-6
68 Methyl tert-Butyl Ether (MTBE) C5H12O 1634-04-4
69 Methylene Chloride CH2Cl2 9-2-1975
70 Methylenediphenyl Diisocyanate C15H10N2O2 101-68-8
71 Molybdenum and its compounds NA NA
72 Naphthalene C10H8 91-20-3
73 Nickel and its compounds NA NA
74 Paraquat Dichloride C12H14Cl2N2 1910-42-5
75 Pentane, n- C5H12 109-66-0
76 Phenol C6H6O 108-95-2
77 Phosphoric Acid H3PO4 7664-38-2
78 Phosphorus pentoxide and other P2O5 1314-56-3
79 Phthalic Anhydride C8H4O3 85-44-9
80 Polyethylene glycol nonylphenyl ether C19H32O3 9016-45-9
81 Potassium chlorate ClKO3 4-9-3811
82 Propanil C9H9Cl2NO 709-98-8
83 PROPIONICACID C3H6O2 9-4-1979
84 Propylene C3H6 115-07-1
85 Propylene Glycol C3H8O2 57-55-6
86 Propylene Oxide C3H6O 75-56-9
87 PROTHIOCARB C8H19ClN2OS 19622-08-3
88 Pyrene C16H10 129-00-0
89 Ryania C25H35NO9 15662-33-6
90 sodium chlorate ClNaO3 7775-9-9
91 Sodium Cyanide NaCN 143-33-9
92 Styrene C8H8 100-42-5
93 Tebuthiuron C9H16N4OS 34014-18-1
94 Tetrachloroethylene C2Cl4 127-18-4
95 Tin and its compounds NA NA
96 Toluene CH3C6H5 108-88-3
97 Trichloroethylene C2HCl3 1-6-1979
98 Trimethylbenzene, 1,2,4- C9H12 95-63-6
99 Trimethylbenzene, 1,3,5- C9H12 108-67-8
100 Trinitrotoluene, 2,4,6- C7H5N3O6 118-96-7
101 Vinyl Acetate C4H6O2 108-05-4
102 Vinyl Chloride C2H3Cl 1975-01-4
103 Xylenes CH3C6H5 1330-20-7
104 Zinc and its compounds NA NA
105 Sox NA NA
106 NOx NA NA
107 Dioxin and Furan NA NA
107 2,3,7,8-Tetrachlorodibenzo-para-dioxin NA 1746-01-6
107 Dibenzo-para-dioxin NA 262-12-4
107 Polychlorinated biphenyls (PCBs), NA NA
107 3,4,5,3’,4’-Pentachlorobiphenyl (PCB-126) NA 57465-28-8
107 Furan NA 110-00-9