Dieldrin Testing Data - May 27, 2026
- nrlee52
- May 27
- 1 min read
Dieldrin Sampling Results - Running Annual Average (RAA) – 124 SAMPLE LOCATIONS | ||
Wells | RAA | Remarks |
30 | Non-Detect (ND) | • No detections for dieldrin |
87 | 0.01 ppb to 0.09 ppb | • 86 locations are less than 0.1 ppb or 50% of the IAL • D-17 offline since 7/31/25; treatment under construction. Result for samples taken on 3/10/26 is 0.1 ppb. RAA is 0.09 ppb. |
4 | 0.10 ppb to 0.14 ppb | • A-23 & A-25 offline for PFAS since 2016; treatment under construction • M-2 & D-18 remain online; RAAs for both are 0.14 and neither has had RAA over the IAL. |
3 |
0.15 ppb to 0.19 ppb | • M-4 offline since 10/3/25; RAA is 0.16 ppb; treatment under construction • M-3 was placed on standby mode on 10/19/25 and will only be placed online intermittently if needed operationally to meet customer demand; Result for samples taken on 5/6/26 is 0.18 ppb; RAA is 0.17 ppb; M-3 was placed offline on 01/26/26, but was temporarily activated from 04/07/26 – 05/18/26 for Super Typhoon Sinlaku recovery and customer demand. • EX-11 remains online and has not had a RAA over the IAL; Result for samples taken on 5/6/26 is 0.15 ppb; RAA is 0.15 ppb. |
