Water-Quality Monitoring Networks (WQN)
- Nonpoint and Point Sources of Nitrogen
- Selected Constituents and Their Importance
- Stream Water Quality in the Conterminous United States
Statistical summary tables for field measurements and selected nitrogen and
phosphorus constituents can be viewed. The period of record for the information
presented varies from state to state and is defined in each table. The frequency
of data collection varies from weekly, to monthly, to yearly, or can be based on
discharge.
Tables:
- Colorado River
- Lower Atchafalaya River
- Mississippi River
- Ohio River
- Rio Grande River
- St. Lawrence River
- Willamette River
Water-Quality Monitoring Networks (WQN)
Nonpoint and Point Sources of Nitrogen
Selected Constituents and Their Importance
Stream Water Quality in the Conterminous United StatesStatistical summary tables for field measurements and selected nitrogen and phosphorus constituents can be viewed. The period of record for the information presented varies from state to state and is defined in each table. The frequency of data collection varies from weekly, to monthly, to yearly, or can be based on discharge.
Tables:
- Colorado River
- Lower Atchafalaya River
- Mississippi River
- Ohio River
- Rio Grande River
- St. Lawrence River
- Willamette River
Colorado River
Lower Atchafalaya River
Mississippi River
Ohio River
Rio Grande River
St. Lawrence River
Willamette River