Water uses which shall be protected, and upon which the development of water quality criteria shall be based, are set forth, accompanied by their identifying symbols, in Table 1:
TABLE 1
| Symbol | Protected Use |
| Aquatic Life | |
| CWF | Cold Water Fishes-Maintenance or propagation, or both, of fish species including the family Salmonidae and additional flora and fauna which are indigenous to a cold water habitat. |
| WWF | Warm Water Fishes-Maintenance and propagation of fish species and additional flora and fauna which are indigenous to a warm water habitat. |
| MF | Migratory Fishes-Passage, maintenance and propagation of anadromous and catadromous fishes and other fishes which move to or from flowing waters to complete their life cycle in other waters. |
| TSF | Trout Stocking-Maintenance of stocked trout from February 15 to July 31 and maintenance and propagation of fish species and additional flora and fauna which are indigenous to a warm water habitat. |
| Water Supply | |
| PWS | Potable Water Supply-Used by the public as defined by the Federal Safe Drinking Water Act, 42 U.S.C.A. § 300F, or by other water users that require a permit from the Department under the Pennsylvania Safe Drinking Water Act (35 P. S. §§ 721.1-721.18), or the act of June 24, 1939 (P. L. 842, No. 365) (32 P. S. §§ 631-641), after conventional treatment, for drinking, culinary and other domestic purposes, such as inclusion into foods, either directly or indirectly. |
| IWS | Industrial Water Supply-Use by industry for inclusion into nonfood products, processing and cooling. |
| LWS | Livestock Water Supply-Use by livestock and poultry for drinking and cleansing. |
| AWS | Wildlife Water Supply-Use for waterfowl habitat and for drinking and cleansing by wildlife. |
| IRS | Irrigation-Used to supplement precipitation for crop production, maintenance of golf courses and athletic fields and other commercial horticultural activities. |
| Recreation and Fish Consumption | |
| B | Boating-Use of the water for power boating, sail boating, canoeing and rowing for recreational purposes when surface water flow or impoundment conditions allow. |
| F | Fishing-Use of the water for the legal taking of fish. For recreation or consumption. |
| WC | Water Contact Sports-Use of the water for swimming and related activities. |
| E | Esthetics-Use of the water as an esthetic setting to recreational pursuits. |
| Special Protection | |
| HQ | High Quality Waters |
| EV | Exceptional Value Waters |
| Other | |
| N | Navigation-Use of the water for the commercial transfer and transport of persons, animals and goods. |
25 Pa. Code § 93.3