turbidity on a PurgeInterval is the parameter most likely to slow or prevent purge stabilization — particularly in fine-grained aquifers. Low-flow protocols require turbidity to drop below a threshold (often 10 NTU) before sampling. Tracking turbidity across PurgeIntervals allows compliance staff and regulators to see whether it was decreasing, increasing, or stable. If turbidity never stabilized, it is documented in the PurgeLog's stabilizationNotes.
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Interval Turbidity
`turbidity` on a PurgeInterval records the cloudiness of the groundwater at this stabilization check during the purge.