Environment-Watershed Phosphate Test Strips

SKU: 33817-P

$16.95USD or lower Each

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Check rivers, lakes, and runoff for phosphate pollution with easy to use Indigo® 0-100 ppm phosphate test strips; ideal for watershed studies, classrooms, and field monitoring.

Phosphate is a key driver of nutrient pollution in rivers, lakes, and streams, where elevated levels can trigger algal blooms, oxygen depletion, and ecosystem degradation. Indigo® 0-100 ppm Phosphate Test Strips provide a fast, practical method for screening surface waters and stormwater runoff to identify areas impacted by fertilizer use, wastewater discharge, or urban runoff. Rapid, on-site results support timely assessment without the need for laboratory instrumentation.

We've been selling phosphate test strips since 2009. Buy fully documented Indigo® phosphate test strips, 50 strips/vial. Guaranteed 3 year shelf life (dated back from expiration date "yyyy.mm.dd").
Details Specs Docs Reviews
Details
Discipline Learning Outcomes / Key Features
Chemistry Understand the chemical forms of phosphate in water (orthophosphate, polyphosphate) and their detection through colorimetric strip testing.
Biology Relate phosphate enrichment to algal bloom formation and oxygen depletion in aquatic ecosystems, illustrating nutrient limitation concepts.
Environmental Science Evaluate how agricultural runoff, lawn fertilizers, and wastewater discharges contribute to eutrophication and declining water quality.
Public Health Recognize the indirect human health impacts of phosphate-driven ecosystem changes, such as harmful algal blooms and fish kills affecting food and recreation.

Tips for Best Results

  • Collect water samples in clean, non-metallic containers to prevent phosphate contamination.
  • Allow sediment to settle before dipping the strip: test the clear portion of water only.
  • For low-phosphate freshwater systems, compare results in shaded light to enhance color accuracy.
  • Keep unused strips sealed and dry: humidity can alter the color reaction.
  • Record data with temperature and recent rainfall notes for meaningful comparisons between sites.
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Specifications

This Indigo® test strip indicates the presence of phosphate. Results for ranges shown below can be read in 30 seconds.

  • Phosphate is measured in increments of 10, 25, 50 & 100ppm
  • Phosphate strips have a detection limit of 5 ppm.
  • The number of strips (50) vial is approximate.
  • These strips have a guaranteed shelf of 3 years from date of manufacture (indicated by expiration date).
  • Reseal the desiccant lined bottle immediately after removing a strip to ensure 3 year shelf life.
  • Vial must be kept tightly sealed & kept at typical room temperatures.
Documentation

A Certificate of Conformance is available on request after shipment.
Indigo® phosphate test strips are made in USA & calibrated with NIST standards.

Test Strip Documentation
Stability Statement Certificate of Analysis SDS
Indigo Phosphate Test strips 0-100ppm Stability Statement Indigo Phosphate Test strips 0-100ppm CoA Indigo Phosphate Test strips 0-100ppm SDS
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