What am I looking at?

Anomaly Data shows current and historical anomalies detected by the USEPA CANARY anomaly detection system.

How do I use this?

Choose the number of entries that you want to see on the same page, and click the column name to sort the data based on your preference.

What does this information mean?

Detection Probability shows the anomaly probabilities calculated by the algorithms. The closer the probability is to zero, there is no or minimal chance of a contamination, meaning that groundwater quality has not changed. The closer the probability is to one, there is a higher chance of groundwater quality changes from normal condition. The changes can be due to a natural change or due to contamination. Parameter shows the parameters that contributed to the anomaly, and Comments describes the source and cause for the analyzed anomaly. Match Algorithm is the algorithm that has detected the anomaly.

For more information about the anomaly detection system, please visit here

For more details about the anomaly detection system, please visit here


CMAX: A consensus algorithm that reports the maximum probability from the probabilities of the anomaly detection algorithms

Event: A period of anomalous water quality

LPCF: Linear Prediction Coefficient Filter

MVNN: Multivariate Near-Neighbor

SPPE: Set-point Proximity