Standard type
Conventional pollutant emission limits
Regulating Body
Pollution Control Department (PCD)
Current Standard
Euro 4 (in Thai)
Applicability
All vehicles in categories M1, M2, and N1 with a reference mass not exceeding 3500kg.
Categories
History
Thailand has subscribed to the Euro system of light-duty vehicle emissions standards since May 1998. Light-duty vehicles in Thailand are currently under Euro 4 emissions standards.
Emission standards for on-road vehicles in Thailand are administered by the Pollution Control Department (PCD) and adopted by the Ministry of Industry (MOI).
The Pollution Control Department was established on June 4, 1992, under the Royal Decree on the Organizational Division of Pollution Control Department, Ministry of Science, Technology and Environment, as result of the Enhancement and Conversation of the National Environment Quality Act of B.E. 2535 (1992).
Technical Standards
New Vehicle Regulations
New light duty gasoline vehicle regulations are based on European standards and emission test procedures, as summarized in the following table.
| Thai Regulation | Reference Standard | Number of Seats | CO | HC+NOx | HC | NOx | Enforcement Date |
|---|---|---|---|---|---|---|---|
| Level 1 TIS1085-2535 |
ECE R 15-04 | Grams per test | – | ||||
| ≤ 9 | 58-110 | 19-28 | – | – | |||
| Level 2 TIS1120-2535 |
ECE R 83 | ≤ 6 | 25-45 | 6.5-28 | – | 3.5 to 6 | 30 Mar 1995 |
| > 6 | 58-110 | 19-23 | – | – | |||
| Level 3 TIS1280-2538 |
ECE R 83-01 (B) Euro 1 (passenger cars) |
Grams per kilometer | 30 Mar 1995 | ||||
| ≤ 6 | 2.72 | 0.97 | – | – | |||
| Grams per test | |||||||
| > 6 | 58-100 | 19-28 | – | – | |||
| Level 4 TIS1365-2539 |
93/59/EEC Euro 1 (PC and light trucks) |
Grams per kilometer | 1 Jan 1997 | ||||
| ≤ 6 | 2.27 | 0.97 | – | – | |||
| > 6 | 2.72-9.9 | 0.97-1.7 | – | – | |||
| Level 5 TIS1440-1997 |
94/12/EEC Euro 2 |
≤ 6 | 2.20 | 0.5 | – | – | 1 Jan 1999 |
| > 6 | 2.72-6.9 | 0.97-1.7 | – | – | |||
| Level 6 TIS1870-1999 |
96/69/EEC Euro 2 |
≤ 6 | 2.20 | 0.5 | – | – | 25 Aug 1999 |
| > 6 | 2.2-5.0 | 0.5-0.7 | – | – | |||
| Level 7 TIS2160-2003 |
1999/102/EC (A) Euro 3 |
≤ 6 | 2.3 | – | 0.2 | 0.15 | 10 Jan 2005 |
| > 6 | 2.3-5.22 | – | 0.2-0.29 | 0.15-0.21 | |||
| Level 8 | 1999/102/EC (B) Euro 4 |
≤ 6 | 2.2 | – | 0.1 | 0.08 | 2012 |
| > 6 | 1.0-2.27 | – | 0.1-0.16 | 0.08-0.11 | |||
New light-duty diesel vehicle regulations are based on European standards and emission test procedures, as summarized in the following table.
| Thai Regulation | Reference Standard | Number of Seats | CO | HC+NOx | NOx | PM | Enforcement Date |
|---|---|---|---|---|---|---|---|
| Level 1 TIS1140-2536 |
ECE R 83-C | Grams per test | 29 Jan 1995 | ||||
| ≤ 6 | 30-45 | 8-5 | – | 6.0 | |||
| > 6 | 58-100 | 19-28 | – | – | |||
| 25-45 | 6.5-15 | – | 3.5-6 | ||||
| Level 2 TIS1285-2538 |
ECE R 83-01 App. C | Grams per kilometer | 23 Feb 1996 | ||||
| ≤ 6 | 2.72 | 0.97 | – | 0.14 | |||
| Grams per test | |||||||
| > 6 | 58-110 | 19-28 | – | – | |||
| Level 3 TIS1370-2539 |
93/59/EEC Euro 1 |
Grams per kilometer | 1 Jan 1997 | ||||
| ≤ 6 | 2.72 | 0.97 | – | 0.14 | |||
| > 6 | 2.72-6.9 | 0.97-1.7 | – | 0.14-0.25 | |||
| Level 4 TIS1435-2540 |
94/12/EC Euro 2 |
≤ 6 | 1.0 | 0.7 | – | 0.08 | 1 Jan 1999 |
| > 6 | 2.72-6.9 | 0.97-1.7 | – | 0.14-0.25 | |||
| Level 5 TIS1875-2542 |
96/69/EEC Euro 2 |
≤ 6 | 1.0 | 0.7 | – | 0.08 | 25 Aug 2001 |
| > 6 | 1.0-1.5 | 0.7-1.2 | – | 0.08-0.17 | |||
| Level 6 TIS2155-2546 |
1999/102/EC (A) Euro 3 |
≤ 6 | 0.64 | 0.56 | 0.5 | 0.05 | 10 Jan 2005 |
| > 6 | 0.64-0.95 | 0.56-0.86 | 0.50-0.78 | 0.05-0.1 | |||
| Level 7 | 1999/102/EC (B) Euro 4 |
≤ 6 | 0.5 | 0.3 | 0.25 | 0.025 | 2012 |
| > 6 | 0.5-0.74 | 0.3-0.46 | 0.25-0.39 | 0.025-0.06 | |||
Detailed emissions standards for light duty diesel vehicles from 1995-2001, including specific limit values according to reference mass, can be found on this page.
In-Use Vehicle Regulations
In-use gasoline vehicles in Thailand must meet the following standards.
| Registration Date | Pollutant | Limit | Measurement Equipment | Measurement Method |
|---|---|---|---|---|
| Listed before Nov 1 1993 | CO HC |
4.5% 600ppm |
NDIR | No load, engine idling |
| Registered since Nov 1 1993 | CO HC |
1.5% 200ppm |
NDIR | No load, engine idling |
| Registered since Jan 1 2007 | CO HC |
0.5% 100ppm |
NDIR | No load, engine idling |
| Note: NDIR – Nondispersive Infrared Sensor | ||||
In-use diesel vehicles in Thailand must meet the following black smoke standards.
| Limit | Measurement method | |
|---|---|---|
| Without load | ||
| 45% | Opacity | |
| 50% | Filter paper | |
| With load | ||
| 35% | Opacity | |
| 40% | Filter paper | |
Links
Regulatory Documents
Pollution Control Department (PCD) Emission Standards for Mobile Sources (in Thai)
