Tier 3 - RTCR Monitoring Tier 3 - RTCR Monitoring https://www.tceq.texas.gov/downloads/drinking-water/notices/microbial/tier-3-rtcr-m.docx/view https://www.tceq.texas.gov/@@site-logo/TCEQ-1072x1072.png Tier 3 - RTCR Monitoring Tier 3 - RTCR Monitoring tier-3-rtcr-m.docx — 35.3 KB