Title 42The Public Health and WelfareRelease 119-73

§1962d–20 Prohibition on Great Lakes diversions

Title 42 › Chapter CHAPTER 19B— - WATER RESOURCES PLANNING › Subchapter SUBCHAPTER IV— - MISCELLANEOUS PROVISIONS › § 1962d–20

Last updated Apr 6, 2026|Official source

Summary

It bans sending or exporting water from any part of the Great Lakes or their tributaries in the United States outside the Great Lakes basin unless every governor of the eight Great Lakes States approves the move. Federal agencies also may not study or spend money on plans to move that water outside the basin without the same unanimous approval. That study ban does not apply to work done by the Corps of Engineers or other federal agencies when they act under the International Joint Commission under the Boundary Waters Treaty of 1909. The law also asks the Great Lakes States, working with Ontario and Quebec, to create a shared conservation standard for withdrawals. Congress said the Great Lakes are a vital resource for water, power, shipping, and recreation and that new diversions would cause major economic and environmental effects and affect U.S.–Canada relations. "Great Lakes State" means Illinois, Indiana, Michigan, Minnesota, Ohio, Pennsylvania, New York, and Wisconsin. The rule does not affect any diversion that was already authorized on November 17, 1986.

Full Legal Text

Title 42, §1962d–20

The Public Health and Welfare — Source: USLM XML via OLRC

(a)The Congress finds and declares that—
(1)the Great Lakes are a most important natural resource to the eight Great Lakes States and two Canadian provinces, providing water supply for domestic and industrial use, clean energy through hydropower production, an efficient transportation mode for moving products into and out of the Great Lakes region, and recreational uses for millions of United States and Canadian citizens;
(2)the Great Lakes need to be carefully managed and protected to meet current and future needs within the Great Lakes basin and Canadian provinces;
(3)any new diversions of Great Lakes water for use outside of the Great Lakes basin will have significant economic and environmental impacts, adversely affecting the use of this resource by the Great Lakes States and Canadian provinces; and
(4)four of the Great Lakes are international waters and are defined as boundary waters in the Boundary Waters Treaty of 1909 between the United States and Canada, and as such any new diversion of Great Lakes water in the United States would affect the relations of the Government of the United States with the Government of Canada.
(b)It is therefore declared to be the purpose and policy of the Congress in this section—
(1)to take immediate action to protect the limited quantity of water available from the Great Lakes system for use by the Great Lakes States and in accordance with the Boundary Waters Treaty of 1909;
(2)to encourage the Great Lakes States, in consultation with the Provinces of Ontario and Quebec, to develop and implement a mechanism that provides a common conservation standard embodying the principles of water conservation and resource improvement for making decisions concerning the withdrawal and use of water from the Great Lakes Basin;
(3)to prohibit any diversion of Great Lakes water by any State, Federal agency, or private entity for use outside the Great Lakes basin unless such diversion is approved by the Governor of each of the Great Lakes States; and
(4)to prohibit any Federal agency from undertaking any studies that would involve the transfer of Great Lakes water for any purpose for use outside the Great Lakes basin.
(c)As used in this section, the term “Great Lakes State” means each of the States of Illinois, Indiana, Michigan, Minnesota, Ohio, Pennsylvania, New York, and Wisconsin.
(d)No water shall be diverted or exported from any portion of the Great Lakes within the United States, or from any tributary within the United States of any of the Great Lakes, for use outside the Great Lakes basin unless such diversion or export is approved by the Governor of each of the Great Lake 11 So in original. Probably should be “Lakes”. States.
(e)No Federal agency may undertake any study, or expend any Federal funds to contract for any study, of the feasibility of diverting water from any portion of the Great Lakes within the United States, or from any tributary within the United States of any of the Great Lakes, for use outside the Great Lakes basin, unless such study or expenditure is approved by the Governor of each of the Great Lakes States. The prohibition of the preceding sentence shall not apply to any study or data collection effort performed by the Corps of Engineers or other Federal agency under the direction of the International Joint Commission in accordance with the Boundary Waters Treaty of 1909.
(f)This section shall not apply to any diversion of water from any of the Great Lakes which is authorized on November 17, 1986.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Codification Section was enacted as part of the Water Resources Development Act of 1986, and not as part of the Water Resources Planning Act which comprises this chapter.

Amendments

2000—Subsec. (b)(2) to (4). Pub. L. 106–541, § 504(a), added par. (2) and redesignated former pars. (2) and (3) as (3) and (4), respectively. Subsec. (d). Pub. L. 106–541, § 504(b), inserted “or exported” after “diverted” and “or export” after “diversion”.

Statutory Notes and Related Subsidiaries

Great Lakes Consumptive Use Study Pub. L. 100–4, title V, § 521, Feb. 4, 1987, 101 Stat. 88, provided that in recognition of the serious impacts on the Great Lakes environment that could occur as a result of increased consumption of Great Lakes water, including loss of wetlands and reduction of fish spawning and habitat areas, as well as serious economic losses to vital Great Lakes industries, the Secretary of the Army in cooperation with the Administrator, other interested departments, agencies, and instrumentalities of the United States, and the eight Great Lakes States, was authorized to conduct a study of the effects of Great Lakes water consumption on economic growth and environmental quality in the Great Lakes region and of control measures that could be implemented to reduce the quantity of water consumed, and further provided an appropriation of $750,000 for fiscal years beginning after Sept. 30, 1986, to carry out such study. Similar provisions were contained in Pub. L. 99–662, title XI, § 1147, Nov. 17, 1986, 100 Stat. 4253. Measurements of Lake Michigan Diversions Pub. L. 99–662, title XI, § 1142, Nov. 17, 1986, 100 Stat. 4253, as amended by Pub. L. 106–53, title V, § 508, Aug. 17, 1999, 113 Stat. 339; Pub. L. 106–541, title V, § 518, Dec. 11, 2000, 114 Stat. 2653, provided that: “(a) Beginning
October 1, 1987, the Secretary, in cooperation with the State of Illinois, shall carry out measurements and make necessary computations required by the decree of the United States Supreme Court (388 U.S. 426) relating to the diversion of water from Lake Michigan and shall coordinate the results with downstate interests. The measurements and computations shall consist of all flow measurements, gauge records, hydraulic and hydrologic computations, including periodic field investigations and measuring device calibrations, necessary to compute the amount of water diverted from Lake Michigan by the State of Illinois and its municipalities, political subdivisions, agencies, and instrumentalities, not including water diverted or used by Federal installations. “(b) There are authorized to be appropriated $1,250,000 for each of fiscal years 1999 through 2003 and $800,000 for each fiscal year beginning after
September 30, 2003, to carry out this section, including those funds necessary to maintain the measurements and computations, as well as necessary capital

Construction

costs associated with the installation of new flow measurement devices or structures declared necessary and appropriate by the Secretary.”

Reference

Citations & Metadata

Citation

42 U.S.C. § 1962d–20

Title 42The Public Health and Welfare

Last Updated

Apr 6, 2026

Release point: 119-73