What is the MCL for nitrate?

The nitrate MCL is different for community and non-community water systems. The MCL for community systems is 10 mg/L but for non-community systems is 20 mg/L. Non-community systems with a nitrate level above 10 mg/L are required to post public notice, but they do not incur a violation unless they exceed 20 mg/L.

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1. My sample paperwork says to collect on a Sunday. Is this required?
2. Where do I collect samples required under the Phase II/V Rules?
3. What is the MCL for nitrate?
4. My water system received a notice of violation letter. What do I do now?
5. Can you send me a copy of my sample results?