| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| DanielleS | "This is a great question! Yes, to a certain extent you can trace contaminants back to the source. You can do this with a combination of approaches ..." | Read more » | almost 4 years ago | |||
| Ag8n | "One common test for water is total organic carbon(TOC). Usually, it's a relatively small instrument that takes water and measures the amount of c..." | Read more » | almost 4 years ago | |||
| amocorro | " @amocorro has marked @cherokeeconcernedcitizens as a co-author. " | Read more » | almost 4 years ago | |||
| mathew | "these are so lovely! " | Read more » | over 9 years ago |