EXHIBIT 23.1
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Registration Statements on Form S-3 (No.
333-142335), Form S-3 (No. 333-168160) and Form S-8 (No. 333-115240) of Pure Cycle Corporation of
our report dated November 12, 2010, related to the financial statements and the effectiveness of
internal control over financial reporting (which expresses an unqualified opinion), which appears
on page F-1 of this annual report on Form 10-K for the fiscal year ended August 31, 2010.
/s/ GHP HORWATH, P.C.
Denver, Colorado
November 12, 2010