USGS compiles water-quality baseline for Paterson Great Falls

What you need to know

• The inventory is a reference point for future assessment, not a verdict on whether the river is getting cleaner or more polluted. It combines historical records from multiple sources, and the report presents the work as supporting understanding and future monitoring. 12
• Its scope spans several issues relevant to park water management, from bacteria and nutrients to contaminants associated with fish-consumption advisories, as well as litter and floating debris. This breadth helps describe what the compiled records cover, but does not mean every issue has been monitored consistently. 1
• The report flags a spatial gap near the base of the Great Falls, downstream of a combined sewer overflow. It also identifies gaps in continuous monitoring and in the consistent tracking of contaminants of concern. 1
• Other identified information needs include better characterisation of debris and identification of harmful algal blooms. These are gaps in monitoring and information, not findings that either problem has increased or decreased. 1
• The baseline sits within a wider management concern: the National Park Service says the Passaic River segment through the park does not support designated uses for aquatic life, fish consumption, primary-contact recreation or public water supply. The inventory does not itself resolve that impaired status. 31

Why this matters

A consolidated record can help park managers understand what historical monitoring has covered and where information is missing. That is relevant in a river segment the National Park Service identifies as impaired, although the inventory alone does not show that conditions or management outcomes have changed. 13

What happens next

The report and its data release are intended to inform future assessment and monitoring. The supplied reporting does not specify whether the identified gaps will be addressed, or when new monitoring might take place. 12

What we know

• The inventory harmonises records from 14 surface-water sites, covering 1,103 sampling days and 32,000 water-quality records collected between 1952 and 2021. 12
• The work was prepared by the USGS with the National Park Service and the Urban Waters Federal Partnership for the Lower Passaic River. 1
• The park’s foundation document lists the river segment as impaired for aquatic life, fish consumption, primary-contact recreation and public water supply. 3

What we don't know

• The available reporting does not establish whether the spatial and temporal monitoring gaps identified by the USGS will be addressed through future monitoring. 1
• The historical inventory does not establish what subsequent monitoring will show about water-quality trends at the park. 12
• The data release covers records through 2021, so the supplied sources do not establish water-quality conditions after that period. 2

Read the reporting

This WildNews briefing synthesises and summarises reporting from the sources below. WildNews did not produce the original reporting. Learn more about how we use AI