Environment & climate
Montreal Protocol on Substances that Deplete the Ozone Layer
Source: UN Treaty Collection · scraped 2026-09-26
Figures below count the 193 UN member states separately from other parties to this treaty (international organizations and non-member observer states) — a treaty can have more parties than there are UN member states.
193/193
RatifiedUN member states
198 in total, incl. 5 non-UN members (Cook Islands, European Union, Holy See, Niue, State of Palestine)
0
Signed, not ratifiedUN member states
0
WithdrawnUN member states
0
No actionUN member states
| Country | Signature | Ratification | Withdrawal | Status |
|---|---|---|---|---|
| Afghanistan | — | 2004-06-17(Accession) | — | Ratified |
| Albania | — | 1999-10-08(Accession) | — | Ratified |
| Algeria | — | 1992-10-20(Accession) | — | Ratified |
| Andorra | — | 2009-01-26(Accession) | — | Ratified |
| Angola | — | 2000-05-17(Accession) | — | Ratified |
| Antigua and Barbuda | — | 1992-12-03(Accession) | — | Ratified |
| Argentina | 1988-06-29 | 1990-09-18 | — | Ratified |
| Armenia | — | 1999-10-01(Accession) | — | Ratified |
| Australia | 1988-06-08 | 1989-05-19 | — | Ratified |
| Austria | 1988-08-29 | 1989-05-03 | — | Ratified |
| Azerbaijan | — | 1996-06-12(Accession) | — | Ratified |
| Bahamas | — | 1993-05-04(Accession) | — | Ratified |
| Bahrain | — | 1990-04-27(Accession) | — | Ratified |
| Bangladesh | — | 1990-08-02(Accession) | — | Ratified |
| Barbados | — | 1992-10-16(Accession) | — | Ratified |
| Belarus | 1988-01-22 | 1988-10-31(Acceptance) | — | Ratified |
| Belgium | 1987-09-16 | 1988-12-30 | — | Ratified |
| Belize | — | 1998-01-09(Accession) | — | Ratified |
| Benin | — | 1993-07-01(Accession) | — | Ratified |
| Bhutan | — | 2004-08-23(Accession) | — | Ratified |
| Bolivia | — | 1994-10-03(Accession) | — | Ratified |
| Bosnia and Herzegovina | — | 1993-09-01(Succession) | — | Ratified |
| Botswana | — | 1991-12-04(Accession) | — | Ratified |
| Brazil | — | 1990-03-19(Accession) | — | Ratified |
| Brunei Darussalam | — | 1993-05-27(Accession) | — | Ratified |
| Bulgaria | — | 1990-11-20(Accession) | — | Ratified |
| Burkina Faso | 1988-09-14 | 1989-07-20 | — | Ratified |
| Burundi | — | 1997-01-06(Accession) | — | Ratified |
| Cabo Verde | — | 2001-07-31(Accession) | — | Ratified |
| Cambodia | — | 2001-06-27(Accession) | — | Ratified |
| Cameroon | — | 1989-08-30(Accession) | — | Ratified |
| Canada | 1987-09-16 | 1988-06-30 | — | Ratified |
| Central African Republic | — | 1993-03-29(Accession) | — | Ratified |
| Chad | — | 1994-06-07 | — | Ratified |
| Chile | 1988-06-14 | 1990-03-26 | — | Ratified |
| China | — | 1991-06-14(Accession) | — | Ratified |
| Colombia | — | 1993-12-06(Accession) | — | Ratified |
| Comoros | — | 1994-10-31(Accession) | — | Ratified |
| Congo | 1988-09-15 | 1994-11-16 | — | Ratified |
| Cook IslandsNon-UN member | — | 2003-12-22(Accession) | — | Ratified |
| Costa Rica | — | 1991-07-30(Accession) | — | Ratified |
| Croatia | — | 1992-09-21(Succession) | — | Ratified |
| Cuba | — | 1992-07-14(Accession) | — | Ratified |
| Cyprus | — | 1992-05-28(Accession) | — | Ratified |
| Czech Republic | — | 1993-09-30(Succession) | — | Ratified |
| Côte d'Ivoire | — | 1993-04-05(Accession) | — | Ratified |
| Democratic People's Republic of Korea | — | 1995-01-24(Accession) | — | Ratified |
| Democratic Republic of the Congo | — | 1994-11-30(Accession) | — | Ratified |
| Denmark | 1987-09-16 | 1988-12-16 | — | Ratified |
| Djibouti | — | 1999-07-30(Accession) | — | Ratified |
| Dominica | — | 1993-03-31(Accession) | — | Ratified |
| Dominican Republic | — | 1993-05-18(Accession) | — | Ratified |
| Ecuador | — | 1990-04-30(Accession) | — | Ratified |
| Egypt | 1987-09-16 | 1988-08-02 | — | Ratified |
| El Salvador | — | 1992-10-02(Accession) | — | Ratified |
| Equatorial Guinea | — | 2006-09-06(Accession) | — | Ratified |
| Eritrea | — | 2005-03-10(Accession) | — | Ratified |
| Estonia | — | 1996-10-17(Accession) | — | Ratified |
| Eswatini | — | 1992-11-10(Accession) | — | Ratified |
| Ethiopia | — | 1994-10-11(Accession) | — | Ratified |
| European UnionNon-UN member | 1987-09-16 | 1988-12-16(Approval) | — | Ratified |
| Fiji | — | 1989-10-23(Accession) | — | Ratified |
| Finland | 1987-09-16 | 1988-12-23(Acceptance) | — | Ratified |
| France | 1987-09-16 | 1988-12-28(Approval) | — | Ratified |
| Gabon | — | 1994-02-09(Accession) | — | Ratified |
| Gambia | — | 1990-07-25(Accession) | — | Ratified |
| Georgia | — | 1996-03-21(Accession) | — | Ratified |
| Germany | 1987-09-16 | 1988-12-16 | — | Ratified |
| Ghana | 1987-09-16 | 1992-07-14 | — | Ratified |
| Greece | 1987-10-29 | 1988-12-29 | — | Ratified |
| Grenada | — | 1993-03-31(Accession) | — | Ratified |
| Guatemala | — | 1989-11-07(Accession) | — | Ratified |
| Guinea | — | 1992-06-25(Accession) | — | Ratified |
| Guinea-Bissau | — | 2002-11-12(Accession) | — | Ratified |
| Guyana | — | 1993-08-12(Accession) | — | Ratified |
| Haiti | — | 2000-03-29(Accession) | — | Ratified |
| Holy SeeNon-UN member | — | 2008-05-05(Accession) | — | Ratified |
| Honduras | — | 1993-10-14(Accession) | — | Ratified |
| Hungary | — | 1989-04-20(Accession) | — | Ratified |
| Iceland | — | 1989-08-29(Accession) | — | Ratified |
| India | — | 1992-06-19(Accession) | — | Ratified |
| Indonesia | 1988-07-21 | 1992-06-26 | — | Ratified |
| Iran | — | 1990-10-03(Accession) | — | Ratified |
| Iraq | — | 2008-06-25(Accession) | — | Ratified |
| Ireland | 1988-09-15 | 1988-12-16 | — | Ratified |
| Israel | 1988-01-14 | 1992-06-30 | — | Ratified |
| Italy | 1987-09-16 | 1988-12-16 | — | Ratified |
| Jamaica | — | 1993-03-31(Accession) | — | Ratified |
| Japan | 1987-09-16 | 1988-09-30(Acceptance) | — | Ratified |
| Jordan | — | 1989-05-31(Accession) | — | Ratified |
| Kazakhstan | — | 1998-08-26(Accession) | — | Ratified |
| Kenya | 1987-09-16 | 1988-11-09 | — | Ratified |
| Kiribati | — | 1993-01-07(Accession) | — | Ratified |
| Kuwait | — | 1992-11-23(Accession) | — | Ratified |
| Kyrgyzstan | — | 2000-05-31(Accession) | — | Ratified |
| Lao People's Democratic Republic | — | 1998-08-21(Accession) | — | Ratified |
| Latvia | — | 1995-04-28(Accession) | — | Ratified |
| Lebanon | — | 1993-03-31(Accession) | — | Ratified |
| Lesotho | — | 1994-03-25(Accession) | — | Ratified |
| Liberia | — | 1996-01-15(Accession) | — | Ratified |
| Libya | — | 1990-07-11(Accession) | — | Ratified |
| Liechtenstein | — | 1989-02-08(Accession) | — | Ratified |
| Lithuania | — | 1995-01-18(Accession) | — | Ratified |
| Luxembourg | 1988-01-29 | 1988-10-17 | — | Ratified |
| Madagascar | — | 1996-11-07(Accession) | — | Ratified |
| Malawi | — | 1991-01-09(Accession) | — | Ratified |
| Malaysia | — | 1989-08-29(Accession) | — | Ratified |
| Maldives | 1988-07-12 | 1989-05-16 | — | Ratified |
| Mali | — | 1994-10-28(Accession) | — | Ratified |
| Malta | 1988-09-15 | 1988-12-29 | — | Ratified |
| Marshall Islands | — | 1993-03-11(Accession) | — | Ratified |
| Mauritania | — | 1994-05-26(Accession) | — | Ratified |
| Mauritius | — | 1992-08-18(Accession) | — | Ratified |
| Mexico | 1987-09-16 | 1988-03-31(Acceptance) | — | Ratified |
| Micronesia | — | 1995-09-06(Accession) | — | Ratified |
| Monaco | — | 1993-03-12(Accession) | — | Ratified |
| Mongolia | — | 1996-03-07(Accession) | — | Ratified |
| Montenegro | — | 2006-10-23(Succession) | — | Ratified |
| Morocco | 1988-01-07 | 1995-12-28 | — | Ratified |
| Mozambique | — | 1994-09-09(Accession) | — | Ratified |
| Myanmar | — | 1993-11-24(Accession) | — | Ratified |
| Namibia | — | 1993-09-20(Accession) | — | Ratified |
| Nauru | — | 2001-11-12(Accession) | — | Ratified |
| Nepal | — | 1994-07-06(Accession) | — | Ratified |
| Netherlands | 1987-09-16 | 1988-12-16(Acceptance) | — | Ratified |
| New Zealand | 1987-09-16 | 1988-07-21 | — | Ratified |
| Nicaragua | — | 1993-03-05(Accession) | — | Ratified |
| Niger | — | 1992-10-09(Accession) | — | Ratified |
| Nigeria | — | 1988-10-31(Accession) | — | Ratified |
| NiueNon-UN member | — | 2003-12-22(Accession) | — | Ratified |
| North Macedonia | — | 1994-03-10(Succession) | — | Ratified |
| Norway | 1987-09-16 | 1988-06-24 | — | Ratified |
| Oman | — | 1999-06-30(Accession) | — | Ratified |
| Pakistan | — | 1992-12-18(Accession) | — | Ratified |
| Palau | — | 2001-05-29(Accession) | — | Ratified |
| Panama | 1987-09-16 | 1989-03-03 | — | Ratified |
| Papua New Guinea | — | 1992-10-27(Accession) | — | Ratified |
| Paraguay | — | 1992-12-03(Accession) | — | Ratified |
| Peru | — | 1993-03-31(Accession) | — | Ratified |
| Philippines | 1988-09-14 | 1991-07-17 | — | Ratified |
| Poland | — | 1990-07-13(Accession) | — | Ratified |
| Portugal | 1987-09-16 | 1988-10-17 | — | Ratified |
| Qatar | — | 1996-01-22(Accession) | — | Ratified |
| Republic of Korea | — | 1992-02-27(Accession) | — | Ratified |
| Moldova | — | 1996-10-24(Accession) | — | Ratified |
| Romania | — | 1993-01-27(Accession) | — | Ratified |
| Russian Federation | 1987-12-29 | 1988-11-10(Acceptance) | — | Ratified |
| Rwanda | — | 2001-10-11(Accession) | — | Ratified |
| Samoa | — | 1992-12-21(Accession) | — | Ratified |
| San Marino | — | 2009-04-23(Accession) | — | Ratified |
| Sao Tome and Principe | — | 2001-11-19(Accession) | — | Ratified |
| Saudi Arabia | — | 1993-03-01(Accession) | — | Ratified |
| Senegal | 1987-09-16 | 1993-05-06 | — | Ratified |
| Serbia | — | 2001-03-12(Succession) | — | Ratified |
| Seychelles | — | 1993-01-06(Accession) | — | Ratified |
| Sierra Leone | — | 2001-08-29(Accession) | — | Ratified |
| Singapore | — | 1989-01-05(Accession) | — | Ratified |
| Slovakia | — | 1993-05-28(Succession) | — | Ratified |
| Slovenia | — | 1992-07-06(Succession) | — | Ratified |
| Solomon Islands | — | 1993-06-17(Accession) | — | Ratified |
| Somalia | — | 2001-08-01(Accession) | — | Ratified |
| South Africa | — | 1990-01-15(Accession) | — | Ratified |
| South Sudan | — | 2012-01-12(Accession) | — | Ratified |
| Spain | 1988-07-21 | 1988-12-16 | — | Ratified |
| Sri Lanka | — | 1989-12-15(Accession) | — | Ratified |
| Saint Kitts and Nevis | — | 1992-08-10(Accession) | — | Ratified |
| Saint Lucia | — | 1993-07-28(Accession) | — | Ratified |
| Saint Vincent and the Grenadines | — | 1996-12-02(Accession) | — | Ratified |
| State of PalestineNon-UN member | — | 2019-03-18(Accession) | — | Ratified |
| Sudan | — | 1993-01-29(Accession) | — | Ratified |
| Suriname | — | 1997-10-14(Accession) | — | Ratified |
| Sweden | 1987-09-16 | 1988-06-29 | — | Ratified |
| Switzerland | 1987-09-16 | 1988-12-28 | — | Ratified |
| Syrian Arab Republic | — | 1989-12-12(Accession) | — | Ratified |
| Tajikistan | — | 1998-01-07(Accession) | — | Ratified |
| Thailand | 1988-09-15 | 1989-07-07 | — | Ratified |
| Timor-Leste | — | 2009-09-16(Accession) | — | Ratified |
| Togo | 1987-09-16 | 1991-02-25 | — | Ratified |
| Tonga | — | 1998-07-29(Accession) | — | Ratified |
| Trinidad and Tobago | — | 1989-08-28(Accession) | — | Ratified |
| Tunisia | — | 1989-09-25(Accession) | — | Ratified |
| Turkmenistan | — | 1993-11-18(Accession) | — | Ratified |
| Tuvalu | — | 1993-07-15(Accession) | — | Ratified |
| Türkiye | — | 1991-09-20(Accession) | — | Ratified |
| Uganda | 1988-09-15 | 1988-09-15 | — | Ratified |
| Ukraine | 1988-02-18 | 1988-09-20(Acceptance) | — | Ratified |
| United Arab Emirates | — | 1989-12-22(Accession) | — | Ratified |
| United Kingdom | 1987-09-16 | 1988-12-16 | — | Ratified |
| United Republic of Tanzania | — | 1993-04-16(Accession) | — | Ratified |
| United States of America | 1987-09-16 | 1988-04-21 | — | Ratified |
| Uruguay | — | 1991-01-08(Accession) | — | Ratified |
| Uzbekistan | — | 1993-05-18(Accession) | — | Ratified |
| Vanuatu | — | 1994-11-21(Accession) | — | Ratified |
| Venezuela | 1987-09-16 | 1989-02-06 | — | Ratified |
| Viet Nam | — | 1994-01-26(Accession) | — | Ratified |
| Yemen | — | 1996-02-21(Accession) | — | Ratified |
| Zambia | — | 1990-01-24(Accession) | — | Ratified |
| Zimbabwe | — | 1992-11-03(Accession) | — | Ratified |