_image credit: https://castlebrookestreamstudy.weebly.com/_

This is a draft page. (briefly define turbidity here)

Add background info:

* 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:

* https://publiclab.org/notes/donblair/08-25-2015/turbidity-001
* https://publiclab.org/wiki/turbidity_sensing

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## Questions

[questions:turbidity]

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## Turbidity 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. 


* Kelley et al., An Affordable Open Source Turbidimeter http://www.mdpi.com/1424-8220/14/4/7142/pdf
* Hackteria.org, Turbiduino:  http://hackteria.org/wiki/DIY_turbidity_meters
* Lambrou et al., A Nephelometric Turbidity System for
Monitoring Residential Drinking Water Quality: http://www2.ucy.ac.cy/~faniseng/publications/SENSAPPEAL09.pdf
- Fondriest review: http://www.fondriest.com/environmental-measurements/equipment/measuring-water-quality/turbidity-sensors-meters-and-methods/
- Hach overview: http://www.hach.com/asset-get.download-en.jsa?code=61798

<iframe src="https://docs.google.com/spreadsheets/d/e/2PACX-1vSc9ZCBfiTnvYinkSJSjyk0kuf4D3jma1FnwAyzQQCocynuqYNB5DXJlcKtRYEfCPLY-J_T5Ods3tYZ/pubhtml?gid=28737041&amp;single=true&amp;widget=true&amp;headers=false" style="border:none;width:100%;height:300px;"></iframe>

(see [Water sensors](https://publiclab.org/wiki/water-sensors) for more, and [click here to add to this table](https://docs.google.com/spreadsheets/d/1UwjRqU8kHTwEcnDdO2Zxkr8zkFkaGfyePJ-cdnxJzw0/edit#gid=28737041))

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## Activities

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

[activities:turbidity]

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## Existing work

[notes:turbidity]