Tier 1 - 1a RTCR EMCL Tier 1 - 1a RTCR EMCL https://www.tceq.texas.gov/downloads/drinking-water/notices/microbial/tier-1-1a-emcl.docx/view https://www.tceq.texas.gov/@@site-logo/TCEQ-logo-header.png Tier 1 - 1a RTCR EMCL Tier 1 - 1a RTCR EMCL tier-1-1a-emcl.docx — 30.8 KB