Wyo. Stat. » Wyo. Stat. / Title 35 - Public Health and Safety / Chapter 11 - ENVIRONMENTAL QUALITY / Article 3 - WATER QUALITY
Wyoming Statutes

Wyo. Stat. § 35-11-301 (2026)

Prohibited acts.

✓ current as of May 2026
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(a) No person, except when authorized by a permit issued
pursuant to the provisions of this act, shall:
          (i) Cause, threaten or allow the discharge of any
pollution or wastes into the waters of the state;

          (ii) Alter the physical, chemical, radiological,
biological or bacteriological properties of any waters of the
state;

          (iii) Construct, install, modify or operate any
sewerage system, treatment works, disposal system or other
facility, excluding uranium mill tailing facilities, capable of
causing or contributing to pollution, except that no permit to
operate shall be required for any publicly owned or controlled
sewerage system, treatment works or disposal system;

          (iv)   Increase the quantity or strength of any
discharge;

          (v) Construct, install, modify or operate any public
water supply or construct any subdivision water supply, except
that no permit to operate shall be required for any publicly
owned or controlled public water supply and a permit under this
section shall not be required for subdivision water supplies
consisting of individual wells serving individual lots of a
subdivision.
Notes of Decisions
Cited in 7 cases, 1980–2000 · leading case: People v. Platte Pipe Line Co., 649 P.2d 208 (Wyo. 1982).
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People v. Platte Pipe Line Co., 649 P.2d 208 (Wyo. 1982). · cites it 53× “On February 18, 1982, the district court granted appellee's motion. In its opinion letter, it indicated that it did not believe that the legislature intended to "impose strict liability for an oil spill.”
Belle Fourche Pipeline Co. v. Elmore Livestock Co., 669 P.2d 505 (Wyo. 1983). · cites it 5× “It provides the means by which the DEQ proceeds against violators of the act after investigations of alleged violations have been conducted pursuant to § 35-11-701, W.S. 1977, Cum.Supp. 1983. Although § 35-11-901, supra, deals with the state's action against violators of the…”
V-1 Oil Co., a Wyoming Corp. v. State of Wyoming, Dep't of Env't Quality Steven P. Gerber, 902 F.2d 1482 (10th Cir. 1990). “This is prohibited by, inter alia, Wyo.Stat. § 35-11-301 (1988). Therefore, the Act authorized Gerber to inspect V-l’s tanks.”
Nickelson v. People, 607 P.2d 904 (Wyo. 1980). “The residents were not required to connect, but they had to buy stock in the company (minimum $1,500.”
V-1 Oil Co. v. People, 799 P.2d 1199 (Wyo. 1990). · cites it 2× “1 This proceeding, as a district court damage action, was separately and consecutively initiated in the First Judicial District under the penal provision of the Wyoming Environmental Quality Act, W.S. 35-11-301(a)(i) and (ii) and 35-ll-901(a) and (q).”
In Re a & T Trailer Park, Inc., 53 B.R. 144 (Bankr. D. Wyo. 1985). “See § 35-11-301 et seq., W.S.1977, 1984 Cum.Supp.”
State of Wyoming v. Federated Serv. Ins. (10th Cir. 2000). “-2- operating in violation of Wyo. Stat. Ann. § 35-11-301 (a)(i)-(ii) , which states that no person shall “[c]ause, threaten or allow the discharge of any pollution or wastes into the waters of the state” or “[a]lter the .”
— Wyo. Stat. § 35-11-301(a)(i) — 3 cases
People v. Platte Pipe Line Co., 649 P.2d 208 (Wyo. 1982). “On February 18, 1982, the district court granted appellee's motion. In its opinion letter, it indicated that it did not believe that the legislature intended to "impose strict liability for an oil spill.”
Belle Fourche Pipeline Co. v. Elmore Livestock Co., 669 P.2d 505 (Wyo. 1983). “It provides the means by which the DEQ proceeds against violators of the act after investigations of alleged violations have been conducted pursuant to § 35-11-701, W.S. 1977, Cum.Supp. 1983. Although § 35-11-901, supra, deals with the state's action against violators of the…”
V-1 Oil Co. v. People, 799 P.2d 1199 (Wyo. 1990). “1 This proceeding, as a district court damage action, was separately and consecutively initiated in the First Judicial District under the penal provision of the Wyoming Environmental Quality Act, W.S. 35-11-301(a)(i) and (ii) and 35-ll-901(a) and (q).”
— Wyo. Stat. § 35-11-301(a)(ii) — 1 case
People v. Platte Pipe Line Co., 649 P.2d 208 (Wyo. 1982). “On February 18, 1982, the district court granted appellee's motion. In its opinion letter, it indicated that it did not believe that the legislature intended to "impose strict liability for an oil spill.”
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