Water quality
water-quality

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
unmanaged "I would be glad to send some SS welding rods to you free of charge... you have access to the scope and tools I do not... I planted the garden today..." | Read more » almost 10 years ago
bgamari "Over the last few days I've been busily reworking some aspects of the measurement. Now we have a much lower excitation voltage (currently 100mV, al..." | Read more » almost 10 years ago
JSummers "Hi Don, I agree with Cversek that you need to keep the voltage difference small. you also might want to look at using graphite electrodes. The ki..." | Read more » almost 10 years ago
donblair "Cversek -- wow, thank you!!! What a useful collection of info. Your note convinced Ben to add a dual op-amp to buffer the conductivity output, and..." | Read more » almost 10 years ago
kanarinka "nice work - it's great to see that the conductivity measurement is coming along like this! " | Read more » almost 10 years ago
cversek "What is the max amplitude of the voltages you are applying across the screws? If this gets too high you could be electrolyzing the water, other io..." | Read more » almost 10 years ago
donblair "Just noticed -- in that last plot, it looks like the 'falling times' (top curve) start 'slumping', whilie the 'rising times' (bottom curve) seem re..." | Read more » almost 10 years ago
donblair "And, as per our discussion elsewhere today, maybe we also want this material to go in a 'wiki' ... if you get a chance, Catherine, maybe you can d..." | Read more » almost 10 years ago
donblair "Yay! " | Read more » almost 10 years ago
warren "This is so exciting. " | Read more » almost 10 years ago
EdMallon "Hi everyone, Just a quick note to say the first gen loggers survived their initial 3 month deployment giving us real water flow data, (6m depth,~ ..." | Read more » about 10 years ago
flint "I would be happy to take some advice as to how to best show off the strembot. " | Read more » about 10 years ago
mathew "well, there's no explanation on your website. By googling the name on the sensor name visible in a photo of yours, I can see that its an e-tape mi..." | Read more » about 10 years ago
flint "No, it uses a passive depth sensor strip. See website. " | Read more » about 10 years ago
liz "Hi Eymund, thanks for including my messy handwriting on post-it notes in your post! This is a fascinating story and i hope some NYCers reach out to..." | Read more » about 10 years ago
mathew "I'm wondering if you could post some more details or sketches of your design? is it using conductivity? " | Read more » about 10 years ago
EdMallon "Hi everyone. I just wanted to post an update as I have done some major code development for the Cave Pearl data logger recently, and a weeks wor..." | Read more » about 10 years ago
eustatic "cool " | Read more » about 10 years ago
mathew "I'm really excited about the possibility of re-purposing fish sonar. I'm used to seeing a very rough output from fish sonars of the bottom + a "bi..." | Read more » about 10 years ago
EdMallon "Hi Warren. Nice to meet you. Wrt cross posting, I am wondering about the content that would be most helpful to the audience here, as I interwove (w..." | Read more » about 10 years ago
maxliboiron "Thanks Warren! " | Read more » about 10 years ago
warren "Wow, super thanks Max! Just wanted to connect you with this recent post on stationary tethered monitoring: http://publiclab.org/notes/EdMallon/02-1..." | Read more » about 10 years ago
warren "Also see this newly posted discussion of dragging underwater loggers: http://publiclab.org/notes/maxliboiron/02-11-2014/underwater-plume-sampling-m..." | Read more » about 10 years ago
warren "Wow, very cool, Ed. Would you be able to cross-post your blog here? How could we make that easier for you? I think a lot of folks here would be int..." | Read more » about 10 years ago