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Assess Turbidity in Water

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As explained in @donblair's primer, measuring turbidity means "measuring the amount of suspended solids in water -- solids that haven't fully dissolved". That is, "turbidity, an optical technique for assessing suspended solids in liquid -- is an important water quality parameter. Typically, light is shone into a liquid sample, and the amount of light scattered back out of the sample (off of particles suspended in it) is measured; the intensity of this scattered light is considered to be related to the amount of suspended solids in the sample." (reference)

image credit: https://castlebrookestreamstudy.weebly.com/

This page needs help!

  • Info about regulations
  • Info about ecological or human health impacts
  • Advocacy leverage points
  • Constraints we're working within: cost, complexity, sensitivity, time

There are a LOT of resources available on these pages by @donblair and others:


Questions

Title Author Updated Likes Comments
How can I calibrate a turbidity sensor? @wmacfarl 5 months ago 4
DFRobot Turbidity Sensor Troubleshooting @mimiss 7 months ago 7
Can you relate Secchi disk measurements to turbidity sensor measurements? @wmacfarl 7 months ago 8
How do I choose a method for monitoring turbidity? @stevie about 2 years ago 2
Has anyone built a secchi disk before? @stevie about 2 years ago 4
What should we look for when sourcing turbidity tubes? @stevie about 2 years ago 7
What are different methods of measuring water turbidity? @warren over 2 years ago 4
How is water turbidity regulated? @warren over 2 years ago 3
How can we detect contaminants in water samples with a DIY spectrometer using reagents? @warren over 2 years ago 1
Can a DIY spectrometer be used to measure water turbidity? @warren over 2 years ago 8
Water Filter Effectiveness @Mempet over 2 years ago 4
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Sensors

Here's a list of different turbidity sensors and measurement systems. See below for some Do-It-Yourself approaches to measuring turbidity, and this page for more information on how turbidity sensors works.

(see Water sensors for more, and click here to add to this table)


Activities

Activities for people to test methods (these develop over time)

Add an activity  or request an activity guide you don't see listed

Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.


Existing work

Title Author Updated Likes Comments
How can I calibrate a turbidity sensor? @wmacfarl 5 months ago 4
How to Connect a pH Sensor to the Simple Water Sensor Platform @wmacfarl 5 months ago 0
Building the Simple Turbidity Sensor Prototype @wmacfarl 6 months ago 12
DFRobot Turbidity Sensor Troubleshooting @mimiss 7 months ago 7
Oil and Gas Hardware Fellow Status Update: Week 6! @wmacfarl 7 months ago 1
Can you relate Secchi disk measurements to turbidity sensor measurements? @wmacfarl 7 months ago 8
Oil and Gas Hardware Fellow Status Update: Week 6! @wmacfarl 7 months ago 1
Testing of DF Robot Turbidity Sensor @wmacfarl 8 months ago 1
PureLab:Experiment and Installing Water Filters Record In Banmentun @shanlter about 1 year ago 3
7 Ways to Measure, Monitor, and Evaluate Water Quality @anngneal about 1 year ago 2
What are some different ways to use turbidity sensors? @lekhidugtal about 1 year ago 0
MicrobeMeter - an innovative photometer for continuous measurement of microbial growth @humanetechnologies over 1 year ago 4
LaMotte and Earth Force low cost Water Monitoring kit @stevie about 2 years ago 2
Turbidity Sensor Assembly @MadTinker about 2 years ago 9
Can the spectrometer or turbocharger be used for lal testing? @Ag8n about 2 years ago 3
How do I choose a method for monitoring turbidity? @stevie about 2 years ago 2
Has anyone built a secchi disk before? @stevie about 2 years ago 4
What should we look for when sourcing turbidity tubes? @stevie about 2 years ago 7
Photometer Kit idea @programmer1200 over 2 years ago 13
What are different methods of measuring water turbidity? @warren over 2 years ago 4
How is water turbidity regulated? @warren over 2 years ago 3
How can we detect contaminants in water samples with a DIY spectrometer using reagents? @warren over 2 years ago 1
Can a DIY spectrometer be used to measure water turbidity? @warren over 2 years ago 8
In addition to testing for pH, what other water quality testing have you utilized, such as turbidity, conductivity, dissolved oxygen (DO), etc.? Can you share your experience with these? @gilbert over 2 years ago 0
Draft: Find the concentration of a liquid with a DIY spectrometer @warren over 2 years ago 3
What's an easy way to compare two liquid samples with a spectrometer? @warren over 2 years ago 8
TURBIDITY MEASUREMENT METHODS & REGULATIONS @gilbert over 2 years ago 0
Water Filter Effectiveness @Mempet over 2 years ago 4
Rough prototype of video analysis tool for monitoring a pixel's brightness/color over time @warren almost 3 years ago 2
Monitor transparency, dissolved oxygen, ORP, and ammonia from a river @shanlter almost 3 years ago 4
Is there a water quality equivalent of Smoke School, the EPA air pollution observer certification? @warren over 3 years ago 1
Design Specifications for Field Camera @tonyc almost 4 years ago 1
Turbidity Sensor @bhickman about 4 years ago 15
Removing ambient interference from turbidity measurements through signal modulation @donblair about 4 years ago 6
Turbidity sensor prototype @donblair over 4 years ago 7
Photo Documentation of Turbid Waters for Advocacy @gretchengehrke over 4 years ago 2
Turbidity 001 @donblair almost 5 years ago 4
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