Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart A - Preliminary Provisions
Article I - Administrative Provisions
Chapter 9 - ENVIRONMENTAL MASTER PLAN
Subchapter B - POLICIES FOR CRITICAL ENVIRONMENTAL AREAS
ENVIRONMENTAL POLICIES FOR WATERSHEDS WITH HIGH QUALITY STREAMS
Section 9.123 - Antidegradation

(a) The highest quality streams of the Commonwealth are unique and ecologically valuable resources. The natural characteristics of watersheds which maintain high quality streams are frequently vulnerable to development activities which may disrupt ecological relationships resulting in the degradation of water quality.

(b) It shall be the environmental policy of the Commonwealth to protect the high quality streams of the Commonwealth by discouraging land use and development activities that degrade or threaten to degrade water quality.