To get a feel for the types of pollutants which might be discharsged into the rivers you can request a report on POTW Discharge and Waste water Effluent Permits. All industries who discharge water to a Publicly Owned Treatment Works or directly to a river must file a report detailing the types of chemicals in their wastewater. To find out more about the quality of your air, there are two resources you can turn to.
Many industries submit numerous reports about their air emissions.
Second, industries must also report clean air act compouds as well. These reports must be filed with the state, You may obtain a copy of this information by calling the state agency responsible for air quality.