Cedar Beach, Southold
National Trends Network: Atomspheric Deposition Monitoring
The National Trends Network is the only network providing a long-term record of precipitation chemistry across the United States. The PEP participates in this monitoring network through collection of data at their sampling station at Cedar Beach in Southold. This site is located away from urban areas and point sources of pollution and is outfitted with a precipitation chemistry collector and gage. The automated collector ensures that the sample is exposed only during precipitation (wet-only-sampling).
Our site operators follow standard operational procedures to help ensure NTN data comparability and representativeness. They collect samples weekly on Tuesday morning, using only containers cleaned at the Central Analytical Laboratory (CAL) at the Illinois State Water Survey (ISWS). They weigh the collection bucket to determine sample volume and transfer the sample from the collection bucket to a shipping bottle. All samples are sent to the CAL for analysis, and data entry, verification, and screening.