Hello, I am looking for informed opinions on the Taylor Salt test kit. I used one in my salt water pool and found my salt levels to be 3600ppm. I was happy to see this and just dumped the test water back into the pool by my skimmer. I now feel dumb because the resulting reaction would have generated Silver Chromate. The first reagent in the kit has Potassium Chromate which reacts with Silver Nitrate. I figured that 1 drop on the reagent should have 5mg or less of the Potassium Chromate (An educated guess based on the 10% by weight amount of the Potassium Chromate in 1 drop 0.05ml). My pool is just over 10,000 gallons and we swam in it immediately after I did this. My filter pump was running at 90% and I have 4 returns. I’m just curious what people think about possible excessive Chromium 6 levels after this test. By my math it should be below the threshold for drinking water. Am I correct or is there a concern that I exposed myself and family to this chemical at a higher concentration. If anyone knows the chemistry and chemicals better I would appreciate any opinion. I feel so dumb for pouring it back in. Thank you for any help.
Taylor Salt Test Dumped Back in Pool
- Thread starter SinkorSwim27
- Start date
- Jul 21, 2013
- 65,189
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Drinking water: The EPA's maximum contaminant level (MCL) for total chromium in drinking water is 100 micrograms per liter (µg/L) or 100 parts per billion (ppb).
The World Health Organization recommends a maximum allowable concentration of 0.05 mg/L (50 ppb) of chromium(VI) in drinking water.
90 mg/37854 kg = 2.4 ppb.
The World Health Organization recommends a maximum allowable concentration of 0.05 mg/L (50 ppb) of chromium(VI) in drinking water.
90 mg/37854 kg = 2.4 ppb.
Chromium in Drinking Water | Drinking Water Contaminants – Standards and Regulations | US EPA
Drinking Water
EPA has an enforceable maximum contaminant level of total chromium in drinking water of 100 µg/L (100 ppb) for public water systems [EPA 1999h].
Chromium (Cr) Toxicity: What are the Standards and Regulations for Chromium Exposure? | Environmental Medicine | ATSDR
Chromium (Cr) Toxicity: What are the Standards and Regulations for Chromium Exposure?
www.atsdr.cdc.gov
The current EPA maximum contaminant level for chromium in drinking water is 100 µg/L.
Based on the small amounts, the level should not pose a serious hazard.
Also, you are not drinking the water, so skin exposure is typically less serious than ingestion.
I would not be concerned.
Also, you are not drinking the water, so skin exposure is typically less serious than ingestion.
I would not be concerned.
Thank you for your quick response! I literally lost sleep over this. I washed out the filters just in case today. Just curious where you get the 90mg to calculate the ppb? I was working on my old chemistry knowledge and struggled to figure out how much 1 drop would have given me. Would the precipitates have been caught in the filter? In the future I will definitely be running this down the drain with sufficient water to dilute. Thank you for your help!!
3,600 ppm is 18 drops at 5 mg each.
I was using your numbers, which seem about right.
You can contact Taylor if you want a second opinion about the risk.
Potassium Chromate Dipotassium chromate 7789-00-6 Percentage: 5-10%
https://www.taylortechnologies.com/en/content/contact-customer-service
Potassium Chromate Dipotassium chromate 7789-00-6 Percentage: 5-10%
https://www.taylortechnologies.com/en/content/contact-customer-service
I think I might even be better off since the 18 drops were the Silver Nitrate and the 1 drop was the Potassium Chromate. That would be even less. Now I will sleep well knowing I didn’t accidentally expose my family to something horrible! Thank you again for your time. It is greatly appreciated!!!
K2CrO4 = 194.19 grams per mole.
CrO42- = 115.99 grams per mole.
Chromium = 52 grams per mole.
52/194 = 27%
The amount of chromate in one drop should be about 0.597 x 5 mg or about 3 mg per drop.
3 mg/37854 kg = 0.08 ppb.
The amount of chromium would be about 1.35 mg.
1.35 mg/37854 kg = 36 parts per trillion (0.036 ppb)
CrO42- = 115.99 grams per mole.
Chromium = 52 grams per mole.
52/194 = 27%
The amount of chromate in one drop should be about 0.597 x 5 mg or about 3 mg per drop.
3 mg/37854 kg = 0.08 ppb.
The amount of chromium would be about 1.35 mg.
1.35 mg/37854 kg = 36 parts per trillion (0.036 ppb)
Last edited:
Thank you for your calculations. I can not express my gratitude enough! You have really put my mind at ease. If you make it to Florida I owe you a good dinner!
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Done!TFP is a registered 501(c)3 non-profit that is maintained by user donations.
All of our content is free of advertisements.
Please consider donating at:
Become a TFP Supporter
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Chromium, as trivalent (+3) chromium, is a trace element that is naturally present in many foods and available as a dietary supplement.
Chromium also exists as hexavalent (+6) chromium, a toxic by-product of stainless steel and other manufacturing processes
In California, the maximum contaminant level (MCL) for hexavalent chromium is 0.010 milligrams per liter (mg/L).
The hexavalent chromium MCL is 0.010 mg/L or 10 µg/L (10 ppb).
The chromium in chromate is hexavalent (+6).
1.35 mg/37854 kg = 0.036 ppb hexavalent chromium, which is 0.36% of the MCL.
www.waterboards.ca.gov
Chromium also exists as hexavalent (+6) chromium, a toxic by-product of stainless steel and other manufacturing processes
In California, the maximum contaminant level (MCL) for hexavalent chromium is 0.010 milligrams per liter (mg/L).
The hexavalent chromium MCL is 0.010 mg/L or 10 µg/L (10 ppb).
The chromium in chromate is hexavalent (+6).
1.35 mg/37854 kg = 0.036 ppb hexavalent chromium, which is 0.36% of the MCL.
Hexavalent Chromium (Chromium-6) | California State Water Resources Control Board
www.waterboards.ca.gov
The 0.010-milligram per liter MCL for hexavalent chromium (also referred to as chromium-6), equivalent to 10 micrograms per liter (µg/L), became effective on July 1, 2014.
The regulations are included in Drinking Water Related Regulations, in the Drinking Water Law Book.
The public health goal (PHG) for Cr(VI) is 0.02 micrograms per liter (μg/L)
In July 2011 OEHHA established a PHG for chromium-6 of 0.02 μg/L.
1.35 mg/37854 kg = 0.036 μg/L.
The regulations are included in Drinking Water Related Regulations, in the Drinking Water Law Book.
The public health goal (PHG) for Cr(VI) is 0.02 micrograms per liter (μg/L)
In July 2011 OEHHA established a PHG for chromium-6 of 0.02 μg/L.
1.35 mg/37854 kg = 0.036 μg/L.
Just make sure to never dump test chemicals in the pool anymore, even if they are technically safe.
- Sep 23, 2015
- 2,012
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Astral Viron V25
The easiest way to ensure no used reagents go back in the pool is to take the sample back inside and test in air conditioned comfort. Doing that way you’ll always have a sink closer then the pool and as a bonus the kit always stays inside, away from sunlight and extreme changes in temperature.