I had no idea what this pamphlet was, and never bothered to ask the boyfriend, so when two women with name tags showed up at my door, I thought they must be Jehovah's Witnesses. Of course, when they saw me, and not a Korean, they were a bit startled too and fumbled to pull out a smart phone with an English language demo of what they were going to be doing. One woman actually had the sense to ask me if I spoke Korean, and then tried her best to explain what they were doing. I didn't get much out of it, but I knew it was something to do with the sink and water so I let them in. They spotted this pamphlet sitting on top of my microwave and excitingly started pointing to it and trying to show me... but... alas, it was all in Korean with almost no pictures beyond the friendly looking water droplet on the cover and happy people drinking water.
By this time the other woman had the smart phone ready for me to listen to an explaination of what they were checking. While I listened, they checked the water. When they were finished, they gave me this report. I was curious, so I looked up in the dictionary what they checked... since water quality used to be my specialty back in my Environmental Science days.
pH- pH (that was a big mystery)
I tried to translate the stuff at the bottom, but Google translate is failing me at the moment and my human dictionary is at work at the moment.
Everything was well within range, as expected. It's not surprising that they're only testing inorganic things here, but I'd be interested in how much organic material I'm consuming in the water here. Pesticides and other runoff that makes their way into the Han River probably aren't good for me either. Of course, tests for those sorts of things are I would imagine more expencive and less portable.
In any case, I feel confident enough about drinking the water here, though I generally stick with bottled water anyway.