Rivers, oceans, lakes, aquifers, groundwater, stormwater, urban canals, underground streams, estuaries, and more -- we are passionate about water quality! This page will help you find resources to explore the waterbodies you care about, and connect with other people who have the same interests: ### Questions on Water Quality: [questions:water-quality] **** ## Monitoring * [Water sampling](/water-sampling) * [Water sensors](/water-sensors) * Posts on #water-monitoring * Posts on #water-testing * Posts on #reagents ## Water quality parameters Read about different water quality parameters here, including pH, nitrogen, conductivity, temperature, ORP and turbidity: * https://publiclab.org/common-water-contaminants Also see this overview of 7 ways to monitorn water quality: * https://publiclab.org/notes/anngneal/12-08-2017/7-ways-to-measure-monitor-and-evaluate-water-quality ## Groups and projects working on water quality issues: [wikis:project:water-quality] **** ## Water quality related pages [wikis:parent:water-quality] **** ## Activities [activities:water-quality]...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| wmacfarl | "This screw actually /doesn't/ calibrate the sensor. It sets the /threshold/ for digital output. I completely forgot about this when I wrote my re..." | Read more » | about 5 years ago | |||
| warren | "I think there is a little screw that can be turned to "tune" each sensor board, so I wonder if you could put both in the same sample and use a smal..." | Read more » | about 5 years ago | |||
| zengirl2 | "Hey, I have a couple of questions that may help to look at the hardware side: Did you use a phone cable for the USB or is it a legit cable used f..." | Read more » | about 5 years ago | |||
| webbhm | "@mimiss These sensors are cheap because they have limited accuracy, they were designed for dish-washers and the like, not technical analysis. Howe..." | Read more » | about 5 years ago | |||
| mimiss | "When discussing ways to make the blinking light easier to read/a bit more accessible at last night’s event we flirted with the idea of 3 LEDs that ..." | Read more » | about 5 years ago | |||
| warren | "Maybe we could do both sound and light? That way it is adaptable for different abilities too. I don't know if we could have one port drive a light..." | Read more » | about 5 years ago | |||
| mimiss | "Please add any other things you can remember @charlotte_clark and @rollinrenola! " | Read more » | about 5 years ago | |||
| mimiss | "Love this build and excited to work more with these sensors. Thanks for putting together such great instructions. I had a chance to work with one ..." | Read more » | about 5 years ago | |||
| warren | "So, i realized entering control-shift-; in a google spreadsheet enters the exact time/date in a cell. Maybe we can modify the Arduino code to send ..." | Read more » | about 5 years ago | |||
| charlotte_clarke | "Yeah my comment came out odd due to markdown -- the underscore is present in both the Arduino code and the script. I was wondering whether it was ..." | Read more » | about 5 years ago | |||
| wmacfarl | "The script will miss substitutions if the data is coming in too quickly -- I put a bunch of delays in the code to slow it down to a point where it..." | Read more » | about 5 years ago | |||
| warren | "That is really odd. I tried a couple other things but can't figure out why this is happening. In theory it should just be pressing the tab key betw..." | Read more » | about 5 years ago | |||
| warren | "Hmm, the script is: function onEdit(e) { var val = e.range.getValue().toString(); if (val.indexOf('_now') !== -1) { e.range.setValue(Dat..." | Read more » | about 5 years ago | |||
| warren | "Oh, it looks like the sensor is sending "_now" instead of "now"... I wonder is it possible to modify the spreadsheet script to match that? " | Read more » | about 5 years ago | |||
| charlotte_clarke | "We have 4 turbidity sensors up and running thanks to Will's very clear and helpful instructions! Excited to use them for the event tonight. I do h..." | Read more » | about 5 years ago | |||
| warren | "Folks at NASA AREN (#aren) sent this over -- a smartphone method for water color, interesting! http://misclab.umeoce.maine.edu/research/HydroColor..." | Read more » | about 5 years ago | |||
| warren | " " | Read more » | about 5 years ago | |||
| warren | "I did this! My first error it was a silly mistake - the yellow/red/black cable was plugged in backwards. "apparently" it makes a difference which ..." | Read more » | about 5 years ago | |||
| liz | "Here are the original attachments @zengirl2 had sent via email: EJ_Presentation__1.pptx EJ_Presentation__2.pptx Environmental_Injustice.docx " | Read more » | about 5 years ago | |||
| esmoreido | "Hi and thanks for the post! I have had an experience with the DFRobot TDS sensor (bought here https://www.aliexpress.com/item/4000030776090.html?sp..." | Read more » | about 5 years ago | |||
| rockets | "glad to come back! " | Read more » | about 5 years ago | |||
| joyofsoy | "We got this response on Twitter: Try to set it on fire?https://t.co/tWmJr26diI— Josh Levinger (@jlev) November 6, 2019 " | Read more » | about 5 years ago | |||
| EdMallon | "Progress with the LED light sensor technique revealed that you can can also measure temperature by timing the reverse-bias charge decay on ANY type..." | Read more » | about 5 years ago | |||
| liz | "So exciting! Always great to hear from you Rockets! :D " | Read more » | about 5 years ago |