I have been being monitored almost 5 years now.
The day of my very first urine drug screen was hot (June of 2006) and I drank a bottle of diet iced green tea on the way to the testing site. The next day, I got a call from the MRO asking me if I had taken Lasix or any other diuretic. (I did not) He told me that the level of dilution was insignificant but that my CM had insisted that he call me anyway. I responded with: "So what you are saying is that she (the CM) isn't rational..."
The MRO didn't answer that one but he did say that if a future urine of mine were ever at that level of dilution that he would sign off on it and I wouldn't be charged extra. I was freaked out anyway because I was unemployed at the time and my total cost for this one screen would be over $100 after the MRO fee was added in. Theoretically, I could be called every day for a screen and be unable to pay my rent.
I was so freaked out that when I left a message on my sponsors voicemail about it, she couldn't understand what I was saying through all the blubbering.
So I feel your pain, lovess. I wasn't accused of tampering and I freaked out. My guess is that with time, this will blow over, but I know it sucks for you right now. As long as you continue in your recovery, things WILL work out. Keep in mind that the state's judgement of your recovery is not the final word. You know that you have stayed clean and as long as that continues, you will succeed in life, whatever the nursing monitor co may say.
P.S. Oh yeah, and I never drink extra liquids before a drop & have plenty to "give" anyway.