Nitrogen
nitrates

Nitrogen or #nitrate contamination of drinking and surface water poses serious health risks, and can result from agricultural runoff in rivers. It is often associated with algal blooms as well. Also see the topic #phosphate. ## Nitrogen: Nitrates, Nitrite, Ammonia, & Ammonium (moved from the [Common Water Contaminants page](/common-water-contaminants)) Nitrates, Nitrite, Ammonia, & Ammonium are all "fixed" forms of nitrogen available to living organisms, and represent different stages of nitrogen in the [nitrogen cycle.](https://en.wikipedia.org/wiki/Nitrogen_cycle) Nitrogen is a major limiting nutrient in plant growth-- when nitrates occur in large quantities in water from fertilizers, manure, or sewage runoff, they can cause algal blooms that create dead zones. Nitrates have also been linked to increased risks of [cancer, and complications with a number of diseases, including asthma](http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1310926/). The EPA limits drinking water concentrations of Nitrates to 10mg/L or lower, however, health threats can occur even at those levels. Ammonia (NH3) and ammonium ion (NH4+) are related chemically by an acid / base reaction: `NH3 + H+ <=> NH4+` The equilibrium between ammonia and ammonium is pH dependent, with the two species being at the same concentration only under fairly alkaline conditions, pH = 9.25. At neutral pH, the concentration of free NH3 is less than 1% that of NH4+. Since this is the case, the concentration of ammonia is usually not significant and can be determined from the concentration of ammonium and the pH. **** ## Questions Questions can be either frequently asked questions, or "next step" challenges we're looking to solve. [questions:nitrogen] ## Activities [activities:nitrogen] ...


Author Comment Last activity Moderation
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Engineerjaykumar " I am telling a advice about to use the Perfect construction technology and proper Admixtures in concrete , if well is constructed with concrete , ..." | Read more » almost 3 years ago
stevie "Also, the drinking water standard for nitrates is 10 milligrams per liter (10 mg/l) nitrate-N, or 45 mg/l nitrate-NO3. Most of the consumer tests f..." | Read more » about 3 years ago
stevie "I just looked into these a little further. All of them use sulphuric acid which can be dangerous. The brown ring test: https://byjus.com/chemistry..." | Read more » about 3 years ago
yp1080030 " different types of nitrate tests: the brown ring test, Devarda's test, diphenylamine test, and copper turning test CLICK HERE " | Read more » about 3 years ago
stevie "Hi! This is helpful thank you!! can you say more about the tests- how you might conduct it, the costs or the supplies you need for each one? " | Read more » about 3 years ago
healthydarkside "There are four different types of nitrate tests: the brown ring test, Devarda's test, diphenylamine test, and copper turning test. The brown ring t..." | Read more » about 3 years ago
Engineerjaykumar "There is so many test for this these are: Nitrate can be removed from drinking water by three methods: distillation, reverse osmosis, and ion excha..." | Read more » about 3 years ago
gloryaec "Stevie, Thanks for asking this of others. Glory  Adams On 12/16/2019 8:59 AM, notifications@publiclab.org wrote: Are the..." | Read more » about 3 years ago
Bronwen "I think the quickest/cheapest nitrate testing kits may be found in your local pet store (or online retailer) in the aquarium section.. you can get ..." | Read more » about 3 years ago
ch_tavan " Thank you Lisdahl, I will try to find smaller flow cells that are easier to clean. I use a green LED and a photodiode BPW21 for the detector part..." | Read more » over 3 years ago
lizdahl " That cell is likely just too big for what you are trying to do and therefore hard to flush. I like using z-cells and tiny volumes since it is eas..." | Read more » over 3 years ago
ch_tavan " I use a flow cell that I bought. It is 0.48 ml in volume. I have problems filling the cell and cleaning. I think my cell is not suitable for my fe..." | Read more » over 3 years ago
lizdahl " The main cost for for a FIA or SIA would be a peristaltic pump and a flow cell - I've built my own a couple of times. You could make a flow cell ..." | Read more » over 3 years ago
cfastie "I have not worked with water chemistry sensors, but your first impression might be a good one -- a device that can send encoded concentrations of N..." | Read more » almost 6 years ago
jpkearns "Our systems are simpler, lower in cost, and made from common local materials. Please get in touch if you have questions - www.aqsolutions.org " | Read more » about 7 years ago
emontoya57 "Very inspiring nice work!!! " | Read more » about 7 years ago
eustatic "very cool. good question regaring the water pressure control, I've often wondered that myself. " | Read more » about 7 years ago
liz "FYI Public Lab, additional informal conversation on this is also happening on the WeChat app -- let us know if you want to join there " | Read more » about 7 years ago
chemcarr "This is very interesting. I am also working towards this kind of analysis, and especially open source accessible, whether fabrication or software/k..." | Read more » almost 8 years ago
Frikkie "Just noticed video1's name show nitrate. Its meant to be nitrite, sorry about that. " | Read more » almost 8 years ago
Phil "This is wicked Stuff! Thanks for sharing! " | Read more » almost 8 years ago
Frikkie "For anyone who wants to try out the excel tool, here is the video’s for the recordings I made for the colorimetric nitrite analysis, the EC and fla..." | Read more » almost 8 years ago