Picloram

Tox Class
Herbicides
Tox CAS
1918-02-1
Tox Medium
Freshwater
Tox Reliability
Low
Publish Date
2023
Tox LOSP 99
6.3
Tox LOSP 95
87
Tox LOSP 90
270
Tox LOSP 80
850
Tox LOSP Unit
µg/L
Tox LOSP 95 Comments

Recommended for application to slightly-to-moderately disturbed ecosystems.

General Comments

The DGVs are expressed in terms of the active ingredient (picloram) rather than commercial formulations, and do not relate to any of the breakdown products of picloram.

The picloram freshwater DGVs have a low reliability classification (Warne et al. 2018) based on the outcomes for the following three criteria:

  • Sample size—12 (good)
  • Type of toxicity data—combined chronic and acute (converted to chronic) data
  • SSD model fit—poor (Inverse Pareto model).

As recommended in ANZG (2018), low reliability DGVs are typically not adequate to assess water quality, but can be used as interim values until more reliable values are derived. If used as interim values, they must be used in conjunction with other lines of evidence.

These DGVs and the information in the corresponding DGVs technical brief for this toxicant should be used in accordance with the detailed guidance provided on the Australian and New Zealand Guidelines for Fresh and Marine Water Quality website.

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