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Performance warehouse
Performance MeasureMeasure #100717006Value #106020621

INVASIVE WEED REMOVAL

Number of acres of invasive species treated annually in parks and natural areas

A complete source packet for this Performance Portland measure: current value, official scale, history, narrative notes, context, and links.

1

Start with value

Use the latest official value and current trend as the first read.

2

Check why it matters

Portland Parks & Recreation (PP&R) cares for about 8,000 acres of natural areas that keep Portland's air and water clean, support wildlife, and provide unique opportunities for people to experience nature locally.

3

Use the source packet

Continue to the chart, official notes, topic links, source URLs, and full history table.

History

Official values

This chart uses the official actual values cached from ClearImpact. The latest point is highlighted; the table below preserves every raw row.

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Latest

2,319

FY 2025 - 26

First shown

875

FY 2021 - 22

Change shown

1,444

Within visible history

06251,2501,8752,500FY 22875FY 23FY 24FY 25FY 262,319X-axis: reporting period. Y-axis: official actual value on the ClearImpact scale.

Full source history

Every cached ClearImpact row for this measure.

PeriodActualTargetTrend
FY 2025 - 262,319—1
FY 2024 - 251,094—1
FY 2023 - 24793—-1
FY 2022 - 23950—1
FY 2021 - 22875—0

Narrative Tabs

Official Performance Portland notes

Why Is This Important?

Portland Parks & Recreation (PP&R) cares for about 8,000 acres of natural areas that keep Portland's air and water clean, support wildlife, and provide unique opportunities for people to experience nature locally. Invasive plants such as non-native blackberry, ivy, and holly can reproduce rapidly and spread quickly. Plants like these take space, nutrients, water, and light from other plants; they degrade ecological diversity and decrease the habitat and scenic value of our shared public spaces. Once these invaders root and spread, it can take years to clean up the habitat, and many more years to re-establish the native plant community. Treating for invasive plants helps native species thrive and supports healthy natural areas for wildlife and people.

What Do The Numbers Show?

The increase in acres treated for invasive weeds comes mainly from a shift in data collection, moving from Ecologist project estimates to field-logged data in Spraymapper, which captures a fuller picture of actual work, including re-treatments. Real growth also played a part, with more certified staff spraying and about $30,000 in added contractor spending. Natural areas work also fluctuates year to year based on conditions and priorities, so some of the change reflects normal variation.

How Did We Arrive at These Numbers?

Data shown in the chart is from chemical treatment of invasive plants only. Tracking the number of acres treated chemically is part of the Oregon Department of Agriculture (ODA)'s required reporting as well as compliance with PP&R's Salmon Safe Certification.

Where Can I Find More Information?

See more detail by viewing the Parks Levy Annual Reports or the webpage for Protect the Best , PP&R's invasive vegetation management program for natural areas.

Parks Levy Annual ReportsProtect the Best
INVASIVE WEED REMOVAL: Number of acres of invasive species treated annually in parks and natural areas | Performance Portland Mirror · Portland Civic Lab