GVRD water quality
 

So about a month ago, I tested my tap water and it was coming out of the tap at 220 ppm. After the RO it was reading at about 10. I thought that was pretty good. Until I tested today and the tap water is now reading 10, and after RO it is at 0. Im just curious to know if this has happened to anybody else locally? Good to know our drinking water fluctuates so much. I guess that would explain why my sediment filter went brown so quickly.

It fluctuates here in Langley, too. But have never seen it as high as 220, or as low as 10... Most of the time it is around 50 - 70 ppm. I do get a lot of brown sediment in my filters, though.

Out here in Coquitlam I get about 5-13 fairly regularly.

Water
 

Here is south surrey I usually get 4-12ppm

We have e coli in our water at the moment

It will fluctuate with precipitation levels. Lots of rain and the turbidity levels rise and so does your TDS readings.

From 220 to 10 though?? That seems like a lot of fluctuation. What do people consider safe drinking levels?

I believe most cities can have it as high as 300ppm

"safe" depends on what those TDS actually are. For example, you're allowed to have x ppm nitrate (it's actually about 44.5ppm nitrate), x ppm phosphate, x ppm this, x ppm that in drinking water.

If the levels in the municipal supply get too high - as I believe they can in Abbotsford due to agricultural contamination of the Abbotsford-Sumas aquifer, they'll pipe in water from some other source and mix it with the municipal supply to dilute the contaminants until they're below the legal limits, which means that over the course of the year the primary source of the water coming out of your taps is probably multiple locations that get blended at different ratios depending on conditions at the time.

Also, the Abbotsford-Sumas aquifer's water table is only a couple of meters below the surface, which makes it very, very shallow from an aquifer point of view, so it's highly susceptible to fluctuations due to surface leaching in response to weather. According to my friends in the hydrogeology department, that aquifer's recharge and flow direction is generally toward the south (meaning that the Canadian side of the aquifer usually has less contamination at the depth we drill our wells), so depending on when people are fertilizing the fields, and when it's raining, and how long it takes contaminants to reach deep enough to make it in to the pumps that bring it back up, I'm not surprised that there would be pretty wild fluctuations over the course of the year.

I guess that would make sense. Thanks for the info. Im gonna test my tap water weekly just to monitor quality fluctuations.