Tetrachloroethylene (perchloroethylene)
Sacramento Suburban Water District
Dry cleaning chemical tetrachloroethylene, or perc, can cause cancer. It pollutes soil and groundwater due to emissions from dry cleaning facilities, and automotive, metalworking and other industries. Read More.
The EPA considers tetrachloroethylene a likely human carcinogen. It has been linked with increased incidence of lung, breast and colon cancers. Tetrachloroethylene also damages the liver, kidneys and central nervous system. The California public health goal of 0.06 parts per billion, set to protect against cancer, is 80 times lower than the amount allowed by the federal government, which is a Maximum Contaminant Level of 5 parts per billion.
445
Samples
0
Samples exceeding legal limit (MCL)
117
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.305 ppb | 96 | 24 | ND - 2.10 ppb |
| 2015 | 0.380 ppb | 60 | 18 | ND - 2.20 ppb |
| 2016 | 0.404 ppb | 74 | 21 | ND - 2.70 ppb |
| 2017 | 0.332 ppb | 84 | 17 | ND - 2.30 ppb |
| 2018 | 0.530 ppb | 62 | 20 | ND - 2.50 ppb |
| 2019 | 0.413 ppb | 69 | 17 | ND - 2.50 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.06 ppb
The EWG Health Guideline of 0.06 ppb for tetrachloroethylene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.
EPA Maximum Contaminant
Level (MCL) 5 ppb
The legal limit for tetrachloroethylene, established in 1991, was based on analytical detection limits at the time that the standard was set. This limit does not fully protect against the risk of cancer due to tetrachloroethylene exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-08 | 5810-075-1305 | 2.10 ppb |
| 2014-01-08 | 5810-104-1050 | 1.40 ppb |
| 2014-01-08 | 5810-105-1055 | 1.10 ppb |
| 2014-01-09 | 5810-081-1220 | 1.50 ppb |
| 2014-01-15 | 5810-020-1007 | ND |
| 2014-01-27 | 5810-107-1235 | ND |
| 2014-01-27 | 5810-246-1005 | 0.860 ppb |
| 2014-03-11 | 5810-246-1220 | 0.660 ppb |
| 2014-04-10 | 5810-104-0930 | 1.30 ppb |
| 2014-04-10 | 5810-105-0930 | 1.000 ppb |
| 2014-04-29 | 5810-020-0848 | ND |
| 2014-04-29 | 5810-075-1230 | 2.00 ppb |
| 2014-04-29 | 5810-081-1130 | 1.20 ppb |
| 2014-04-29 | 5810-107-1040 | ND |
| 2014-04-29 | 5810-246-0930 | ND |
| 2014-05-08 | 5810-244-1000 | ND |
| 2014-06-19 | 5810-004-1105 | ND |
| 2014-06-19 | 5810-061-0950 | ND |
| 2014-06-19 | 5810-062-1000 | ND |
| 2014-06-19 | 5810-064-1120 | ND |
| 2014-07-01 | 5810-034-0920 | ND |
| 2014-07-08 | 5810-015-1000 | ND |
| 2014-07-08 | 5810-042-1030 | ND |
| 2014-07-09 | 5810-007-1325 | ND |
| 2014-07-09 | 5810-052-1130 | ND |
| 2014-07-10 | 5810-033-1150 | ND |
| 2014-07-15 | 5810-018-1030 | ND |
| 2014-07-16 | 5810-035-1100 | ND |
| 2014-07-16 | 5810-066-0915 | ND |
| 2014-07-16 | 5810-074-1155 | ND |
| 2014-07-17 | 5810-019-1150 | ND |
| 2014-07-17 | 5810-051-1100 | ND |
| 2014-07-17 | 5810-054-1300 | ND |
| 2014-07-17 | 5810-071-1020 | ND |
| 2014-07-23 | 5810-013-1230 | ND |
| 2014-07-23 | 5810-083-1005 | ND |
| 2014-07-23 | 5810-089-1205 | ND |
| 2014-07-23 | 5810-145-1130 | ND |
| 2014-07-24 | 5810-065-1115 | 0.820 ppb |
| 2014-07-29 | 5810-032-1130 | ND |
| 2014-08-11 | 5810-087-1115 | ND |
| 2014-08-11 | 5810-088-1200 | ND |
| 2014-08-13 | 5810-020-1130 | 0.820 ppb |
| 2014-08-18 | 5810-246-1030 | 0.710 ppb |
| 2014-08-19 | 5810-080-1145 | ND |
| 2014-08-19 | 5810-081-1300 | 1.30 ppb |
| 2014-08-19 | 5810-081-1304 | 1.30 ppb |
| 2014-08-19 | 5810-085-1115 | ND |
| 2014-08-19 | 5810-102-1030 | ND |
| 2014-08-19 | 5810-240-1230 | ND |
| 2014-08-20 | 5810-075-0930 | 1.60 ppb |
| 2014-08-20 | 5810-098-1110 | ND |
| 2014-08-20 | 5810-104-0955 | 1.30 ppb |
| 2014-08-20 | 5810-105-0955 | 0.880 ppb |
| 2014-08-20 | 5810-107-1045 | ND |
| 2014-08-21 | 5810-010-1115 | ND |
| 2014-08-21 | 5810-012-1200 | ND |
| 2014-08-21 | 5810-028-1345 | ND |
| 2014-08-21 | 5810-069-1030 | ND |
| 2014-08-21 | 5810-244-0945 | ND |
| 2014-08-26 | 5810-106-1015 | ND |
| 2014-08-26 | 5810-111-1025 | ND |
| 2014-08-27 | 5810-017-1045 | ND |
| 2014-08-28 | 5810-030-1130 | ND |
| 2014-08-28 | 5810-073-0940 | ND |
| 2014-09-04 | 5810-016-0930 | ND |
| 2014-09-10 | 5810-078-1130 | ND |
| 2014-09-10 | 5810-133-1145 | ND |
| 2014-09-10 | 5810-142-1245 | ND |
| 2014-09-16 | 5810-021-1200 | ND |
| 2014-09-16 | 5810-072-1045 | ND |
| 2014-09-17 | 5810-056-1040 | ND |
| 2014-09-17 | 5810-070-0940 | ND |
| 2014-09-24 | 5810-001-0945 | ND |
| 2014-09-24 | 5810-002-1120 | ND |
| 2014-09-29 | 5810-065-0945 | ND |
| 2014-10-01 | 5810-029-1030 | ND |
| 2014-10-01 | 5810-067-0945 | ND |
| 2014-10-01 | 5810-088-0934 | ND |
| 2014-10-01 | 5810-246-1051 | 0.700 ppb |
| 2014-10-06 | 5810-020-0939 | 0.680 ppb |
| 2014-10-07 | 5810-081-1340 | 1.40 ppb |
| 2014-10-08 | 5810-022-0930 | ND |
| 2014-10-08 | 5810-027-1120 | ND |
| 2014-10-08 | 5810-055-1020 | ND |
| 2014-10-08 | 5810-135-1210 | ND |
| 2014-10-09 | 5810-025-1145 | ND |
| 2014-10-15 | 5810-244-0930 | ND |
| 2014-10-21 | 5810-075-1100 | 2.10 ppb |
| 2014-10-21 | 5810-104-1130 | 1.60 ppb |
| 2014-10-21 | 5810-105-1130 | 0.970 ppb |
| 2014-10-21 | 5810-107-1230 | ND |
| 2014-10-22 | 5810-136-1120 | ND |
| 2014-10-22 | 5810-137-1230 | ND |
| 2014-10-23 | 5810-106-0930 | ND |
| 2014-12-10 | 5810-011-1315 | ND |
| 2015-01-07 | 5810-081-1050 | 1.20 ppb |
| 2015-01-08 | 5810-020-0955 | ND |
| 2015-01-14 | 5810-088-0957 | ND |
| 2015-01-14 | 5810-246-0920 | ND |
| 2015-01-15 | 5810-104-1210 | 1.10 ppb |
| 2015-01-15 | 5810-105-1215 | 0.800 ppb |
| 2015-01-15 | 5810-244-1140 | ND |
| 2015-01-22 | 5810-075-1000 | 1.90 ppb |
| 2015-03-30 | 5810-065-1003 | ND |
| 2015-04-02 | 5810-020-1308 | ND |
| 2015-04-06 | 5810-088-1216 | ND |
| 2015-04-06 | 5810-246-1025 | ND |
| 2015-04-20 | 5810-075-0925 | 2.00 ppb |
| 2015-04-20 | 5810-104-1100 | 1.40 ppb |
| 2015-04-20 | 5810-105-1110 | 0.780 ppb |
| 2015-04-21 | 5810-081-1125 | 1.20 ppb |
| 2015-05-18 | 5810-065-0942 | ND |
| 2015-07-09 | 5810-075-0930 | 1.80 ppb |
| 2015-07-09 | 5810-098-1100 | ND |
| 2015-07-09 | 5810-104-1015 | 1.30 ppb |
| 2015-07-09 | 5810-105-1015 | 0.810 ppb |
| 2015-07-09 | 5810-106-1030 | ND |
| 2015-07-09 | 5810-107-1140 | ND |
| 2015-07-13 | 5810-001-1135 | ND |
| 2015-07-13 | 5810-020-0930 | ND |
| 2015-07-13 | 5810-027-1235 | ND |
| 2015-07-14 | 5810-081-1130 | 1.30 ppb |
| 2015-07-14 | 5810-083-1410 | ND |
| 2015-07-14 | 5810-087-1105 | ND |
| 2015-07-14 | 5810-088-1005 | ND |
| 2015-07-14 | 5810-089-1200 | ND |
| 2015-07-14 | 5810-246-1320 | 0.560 ppb |
| 2015-07-21 | 5810-111-1250 | ND |
| 2015-07-22 | 5810-065-1150 | ND |
| 2015-08-06 | 5810-066-1200 | ND |
| 2015-08-12 | 5810-011-1100 | ND |
| 2015-08-12 | 5810-015-0910 | ND |
| 2015-08-12 | 5810-018-0955 | ND |
| 2015-08-12 | 5810-052-0915 | ND |
| 2015-08-13 | 5810-013-1005 | ND |
| 2015-08-17 | 5810-061-1136 | ND |
| 2015-08-18 | 5810-078-1205 | ND |
| 2015-08-18 | 5810-142-1325 | ND |
| 2015-08-18 | 5810-145-1120 | ND |
| 2015-08-19 | 5810-007-1344 | ND |
| 2015-09-14 | 5810-080-0850 | ND |
| 2015-09-14 | 5810-240-0935 | ND |
| 2015-09-14 | 5810-244-1040 | ND |
| 2015-09-15 | 5810-085-0905 | ND |
| 2015-09-15 | 5810-102-1015 | ND |
| 2015-09-17 | 5810-135-1315 | ND |
| 2015-10-08 | 5810-075-0930 | 2.20 ppb |
| 2015-10-08 | 5810-104-1020 | 1.60 ppb |
| 2015-10-08 | 5810-105-1025 | 1.10 ppb |
| 2015-10-15 | 5810-020-1220 | ND |
| 2015-10-19 | 5810-088-0920 | ND |
| 2015-10-19 | 5810-246-0900 | 0.520 ppb |
| 2015-10-20 | 5810-081-1200 | 1.20 ppb |
| 2015-10-26 | 5810-065-0925 | ND |
| 2015-12-30 | 5810-133-0900 | ND |
| 2016-01-11 | 5810-081-1415 | 1.000 ppb |
| 2016-01-13 | 5810-020-1050 | ND |
| 2016-01-13 | 5810-246-0900 | 0.790 ppb |
| 2016-01-14 | 5810-065-1030 | ND |
| 2016-01-14 | 5810-088-1200 | ND |
| 2016-01-14 | 5810-104-1035 | 1.50 ppb |
| 2016-01-14 | 5810-105-1040 | 1.10 ppb |
| 2016-01-26 | 5810-075-1100 | 2.70 ppb |
| 2016-01-28 | 5810-081-1030 | 1.10 ppb |
| 2016-02-02 | 5810-088-1315 | ND |
| 2016-02-02 | 5810-088-1415 | ND |
| 2016-02-08 | 5810-089-0950 | ND |
| 2016-03-09 | 5810-097-0940 | ND |
| 2016-04-04 | 5810-075-1005 | 2.20 ppb |
| 2016-04-04 | 5810-104-1330 | 1.20 ppb |
| 2016-04-04 | 5810-105-1415 | 1.40 ppb |
| 2016-04-13 | 5810-065-1000 | ND |
| 2016-04-13 | 5810-246-1250 | ND |
| 2016-04-27 | 5810-081-0945 | 0.860 ppb |
| 2016-06-13 | 5810-085-1300 | ND |
| 2016-06-13 | 5810-102-1045 | ND |
| 2016-06-13 | 5810-244-1220 | ND |
| 2016-06-23 | 5810-076-1345 | ND |
| 2016-07-07 | 5810-011-1155 | ND |
| 2016-07-07 | 5810-013-1240 | ND |
| 2016-07-07 | 5810-015-0945 | ND |
| 2016-07-07 | 5810-018-0940 | ND |
| 2016-07-07 | 5810-101-1200 | ND |
| 2016-07-07 | 5810-104-1000 | 1.90 ppb |
| 2016-07-07 | 5810-105-1130 | 1.50 ppb |
| 2016-07-11 | 5810-001-1115 | ND |
| 2016-07-11 | 5810-075-1000 | 2.50 ppb |
| 2016-07-11 | 5810-077-0940 | ND |
| 2016-07-11 | 5810-083-1150 | 0.810 ppb |
| 2016-07-11 | 5810-142-1225 | ND |
| 2016-07-11 | 5810-144-1115 | ND |
| 2016-07-11 | 5810-145-0915 | ND |
| 2016-07-12 | 5810-027-1020 | ND |
| 2016-07-12 | 5810-087-1210 | ND |
| 2016-07-12 | 5810-094-1010 | ND |
| 2016-07-12 | 5810-098-1000 | ND |
| 2016-07-13 | 5810-061-1150 | ND |
| 2016-07-13 | 5810-066-1015 | ND |
| 2016-07-13 | 5810-096-1130 | ND |
| 2016-07-13 | 5810-111-1130 | ND |
| 2016-07-13 | 5810-240-1140 | ND |
| 2016-07-13 | 5810-246-0910 | 0.540 ppb |
| 2016-07-14 | 5810-107-1115 | ND |
| 2016-07-19 | 5810-078-1415 | ND |
| 2016-07-19 | 5810-139-1345 | ND |
| 2016-07-20 | 5810-007-1300 | ND |
| 2016-07-20 | 5810-092-1050 | ND |
| 2016-07-20 | 5810-133-1100 | ND |
| 2016-07-21 | 5810-082-1240 | ND |
| 2016-07-26 | 5810-052-0915 | ND |
| 2016-07-27 | 5810-018-0900 | ND |
| 2016-07-27 | 5810-018-1110 | ND |
| 2016-08-02 | 5810-020-1240 | 0.970 ppb |
| 2016-08-09 | 5810-248-1358 | ND |
| 2016-08-10 | 5810-065-1100 | ND |
| 2016-08-16 | 5810-083-1336 | ND |
| 2016-08-23 | 5810-083-1635 | ND |
| 2016-09-28 | 5810-146-1250 | ND |
| 2016-10-06 | 5810-018-0950 | ND |
| 2016-10-11 | 5810-020-1140 | ND |
| 2016-10-11 | 5810-065-1405 | ND |
| 2016-10-11 | 5810-075-1130 | 1.90 ppb |
| 2016-10-12 | 5810-083-1425 | 0.760 ppb |
| 2016-10-12 | 5810-246-1225 | 0.900 ppb |
| 2016-10-14 | 5810-104-1244 | 2.10 ppb |
| 2016-10-14 | 5810-105-1240 | 2.20 ppb |
| 2016-10-26 | 5810-248-1400 | ND |
| 2016-11-07 | 5810-135-1025 | ND |
| 2016-11-14 | 1233-250-1200 | ND |
| 2017-01-09 | 5810-018-1125 | ND |
| 2017-01-09 | 5810-020-1000 | ND |
| 2017-01-17 | 5810-075-0945 | 2.30 ppb |
| 2017-01-18 | 5810-065-1000 | ND |
| 2017-01-25 | 5810-248-1420 | ND |
| 2017-01-26 | 5810-104-1020 | 1.90 ppb |
| 2017-01-26 | 5810-105-1025 | 1.80 ppb |
| 2017-01-31 | 5810-246-1312 | ND |
| 2017-02-01 | 5810-083-1255 | ND |
| 2017-04-04 | 5810-246-1205 | ND |
| 2017-04-05 | 5810-065-1015 | ND |
| 2017-04-12 | 5810-075-0955 | 1.80 ppb |
| 2017-04-17 | 5810-248-1320 | ND |
| 2017-04-25 | 5810-020-1155 | ND |
| 2017-04-25 | 5810-104-1110 | 1.50 ppb |
| 2017-04-25 | 5810-105-1120 | 1.50 ppb |
| 2017-04-26 | 5810-083-1330 | ND |
| 2017-07-05 | 5810-075-1000 | 2.10 ppb |
| 2017-07-05 | 5810-104-1130 | 1.40 ppb |
| 2017-07-05 | 5810-105-1140 | 1.80 ppb |
| 2017-07-12 | 5810-065-1020 | ND |
| 2017-07-13 | 5810-020-1147 | 1.20 ppb |
| 2017-07-17 | 5810-083-0848 | 0.680 ppb |
| 2017-07-17 | 5810-246-0958 | ND |
| 2017-07-18 | 5810-002-1115 | ND |
| 2017-09-05 | 9590-001-1100 | ND |
| 2017-09-05 | 9590-062-0845 | ND |
| 2017-09-05 | 9590-085-1030 | ND |
| 2017-09-05 | 9590-244-1050 | ND |
| 2017-09-06 | 9590-080-1050 | ND |
| 2017-09-06 | 9590-098-1020 | ND |
| 2017-09-06 | 9590-107-1145 | ND |
| 2017-09-06 | 9590-240-1200 | ND |
| 2017-09-07 | 9590-073-1345 | ND |
| 2017-09-11 | 9590-022-1115 | ND |
| 2017-09-11 | 9590-034-1330 | ND |
| 2017-09-11 | 9590-051-1100 | ND |
| 2017-09-11 | 9590-052-1000 | ND |
| 2017-09-12 | 9590-010-0930 | ND |
| 2017-09-12 | 9590-021-1115 | ND |
| 2017-09-12 | 9590-042-1230 | ND |
| 2017-09-12 | 9590-064-1145 | ND |
| 2017-09-12 | 9590-066-1030 | ND |
| 2017-09-12 | 9590-070-1200 | ND |
| 2017-09-12 | 9590-072-1330 | ND |
| 2017-09-12 | 9590-081-0940 | 1.20 ppb |
| 2017-09-12 | 9590-087-1300 | ND |
| 2017-09-13 | 9590-054-1335 | ND |
| 2017-09-13 | 9590-056-1045 | ND |
| 2017-09-13 | 9590-078-0927 | ND |
| 2017-09-13 | 9590-145-1019 | ND |
| 2017-09-14 | 9590-011-0900 | ND |
| 2017-09-14 | 9590-071-0945 | ND |
| 2017-09-19 | 9590-015-1330 | ND |
| 2017-09-19 | 9590-018-1300 | ND |
| 2017-09-19 | 9590-020-0900 | 1.20 ppb |
| 2017-09-19 | 9590-025-1120 | ND |
| 2017-09-19 | 9590-032-1100 | ND |
| 2017-09-21 | 9590-065-1145 | ND |
| 2017-09-25 | 9590-019-1030 | ND |
| 2017-09-26 | 9590-013-0900 | ND |
| 2017-09-26 | 9590-030-1130 | ND |
| 2017-09-26 | 9590-061-1100 | ND |
| 2017-09-26 | 9590-102-0900 | ND |
| 2017-09-26 | 9590-142-1251 | ND |
| 2017-09-27 | 9590-007-1235 | ND |
| 2017-09-27 | 9590-027-1200 | ND |
| 2017-09-27 | 9590-111-1100 | ND |
| 2017-09-28 | 9590-035-0920 | ND |
| 2017-09-28 | 9590-069-1315 | ND |
| 2017-10-03 | 9590-029-0945 | ND |
| 2017-10-05 | 9590-020-1025 | ND |
| 2017-10-06 | 9590-074-0937 | ND |
| 2017-10-11 | 9590-081-1340 | 1.30 ppb |
| 2017-10-11 | 9590-083-0921 | ND |
| 2017-10-12 | 9590-065-1110 | ND |
| 2017-10-12 | 9590-246-1158 | ND |
| 2017-10-25 | 9590-104-1015 | 2.20 ppb |
| 2017-10-25 | 9590-105-1200 | 2.00 ppb |
| 2017-11-07 | 9590-089-1040 | ND |
| 2017-11-20 | 9590-075-1015 | 2.00 ppb |
| 2017-12-12 | 9590-012-1140 | ND |
| 2017-12-13 | 9590-055-1320 | ND |
| 2017-12-19 | 9590-065-0955 | ND |
| 2018-01-02 | 9590-075-0855 | 2.40 ppb |
| 2018-01-04 | 9590-104-0935 | 2.30 ppb |
| 2018-01-10 | 9590-018-1118 | ND |
| 2018-01-11 | 9590-246-0906 | ND |
| 2018-01-18 | 9590-020-1215 | ND |
| 2018-01-18 | 9590-065-1135 | ND |
| 2018-01-23 | 9590-105-0845 | 2.10 ppb |
| 2018-01-31 | 9590-083-1430 | ND |
| 2018-03-09 | 9590-018-1050 | ND |
| 2018-03-13 | 9590-135-1153 | 0.530 ppb |
| 2018-03-27 | 9590-136-1151 | ND |
| 2018-04-16 | 9590-020-1030 | ND |
| 2018-04-19 | 9590-065-1135 | ND |
| 2018-04-19 | 9590-081-0918 | 0.720 ppb |
| 2018-04-26 | 9590-104-1205 | 2.50 ppb |
| 2018-04-26 | 9590-105-1215 | 2.10 ppb |
| 2018-04-26 | 9590-246-1030 | ND |
| 2018-05-15 | 9590-075-0930 | 2.50 ppb |
| 2018-05-22 | 9590-083-1200 | 0.630 ppb |
| 2018-06-07 | 9590-018-1216 | ND |
| 2018-07-09 | 9590-001-1405 | ND |
| 2018-07-09 | 9590-052-1103 | ND |
| 2018-07-11 | 2920-011-1141 | ND |
| 2018-07-12 | 2920-098-0825 | ND |
| 2018-07-12 | 2920-133-0945 | ND |
| 2018-07-12 | 2920-139-1029 | ND |
| 2018-07-16 | 9590-078-0925 | ND |
| 2018-07-16 | 9590-246-1314 | ND |
| 2018-07-17 | 9590-020-1100 | ND |
| 2018-07-17 | 9590-027-1100 | ND |
| 2018-07-17 | 9590-065-1230 | ND |
| 2018-07-17 | 9590-083-1415 | 1.10 ppb |
| 2018-07-17 | 9590-087-1020 | ND |
| 2018-07-17 | 9590-089-0935 | ND |
| 2018-07-17 | 9590-111-1225 | ND |
| 2018-07-17 | 9590-240-1410 | ND |
| 2018-07-18 | 9590-085-1057 | ND |
| 2018-07-18 | 9590-107-1225 | ND |
| 2018-07-24 | 9590-013-1000 | ND |
| 2018-07-24 | 9590-015-0915 | ND |
| 2018-07-24 | 9590-061-1225 | ND |
| 2018-07-24 | 9590-066-1205 | ND |
| 2018-07-24 | 9590-248-1310 | ND |
| 2018-07-25 | 9590-007-1345 | ND |
| 2018-07-26 | 9590-081-1106 | 1.000 ppb |
| 2018-07-26 | 9590-104-1045 | 1.90 ppb |
| 2018-07-26 | 9590-105-1120 | 2.20 ppb |
| 2018-07-26 | 9590-244-0825 | ND |
| 2018-07-31 | 9590-075-0815 | 1.90 ppb |
| 2018-07-31 | 9590-080-1055 | ND |
| 2018-07-31 | 9590-102-1345 | ND |
| 2018-09-13 | 9590-018-1142 | ND |
| 2018-10-04 | 9590-083-1425 | 0.910 ppb |
| 2018-10-04 | 9590-246-1005 | 0.540 ppb |
| 2018-10-11 | 9590-020-1010 | ND |
| 2018-10-17 | 9590-104-1210 | 2.20 ppb |
| 2018-10-17 | 9590-105-1100 | 2.30 ppb |
| 2018-10-25 | 9590-075-1000 | 2.00 ppb |
| 2018-10-29 | 9590-065-1048 | ND |
| 2018-10-30 | 9590-081-1015 | 1.000 ppb |
| 2018-11-15 | 1233-240-1040 | ND |
| 2018-12-03 | 9590-018-1230 | ND |
| 2019-01-07 | 9590-246-0914 | 0.500 ppb |
| 2019-01-10 | 9590-081-0830 | 0.720 ppb |
| 2019-01-24 | 9590-020-1247 | ND |
| 2019-01-24 | 9590-075-0820 | 1.80 ppb |
| 2019-01-29 | 9590-065-1040 | ND |
| 2019-01-30 | 9590-104-0850 | 2.50 ppb |
| 2019-01-30 | 9590-105-0900 | 2.30 ppb |
| 2019-03-12 | 9590-018-1230 | ND |
| 2019-04-04 | 9590-020-1115 | ND |
| 2019-04-10 | 9590-083-1435 | ND |
| 2019-04-16 | 9590-081-1200 | 0.800 ppb |
| 2019-04-17 | 9590-075-0815 | 2.10 ppb |
| 2019-04-17 | 9590-104-1000 | 2.00 ppb |
| 2019-04-17 | 9590-105-1015 | 1.90 ppb |
| 2019-04-17 | 9590-246-1213 | ND |
| 2019-04-18 | 9590-065-1001 | ND |
| 2019-05-30 | 1233-250-1530 | ND |
| 2019-06-18 | 9590-018-0932 | ND |
| 2019-07-09 | 9590-078-1000 | ND |
| 2019-07-09 | 9590-083-1410 | ND |
| 2019-07-09 | 9590-089-1315 | ND |
| 2019-07-09 | 9590-096-0930 | ND |
| 2019-07-09 | 9590-098-1311 | ND |
| 2019-07-09 | 9590-246-1030 | ND |
| 2019-07-10 | 9590-020-0817 | ND |
| 2019-07-10 | 9590-052-1019 | ND |
| 2019-07-10 | 9590-075-0930 | 1.80 ppb |
| 2019-07-10 | 9590-076-1200 | ND |
| 2019-07-10 | 9590-077-0920 | ND |
| 2019-07-10 | 9590-094-1350 | ND |
| 2019-07-10 | 9590-104-1121 | 1.90 ppb |
| 2019-07-10 | 9590-105-1221 | 1.90 ppb |
| 2019-07-10 | 9590-145-1030 | ND |
| 2019-07-10 | 9590-244-1000 | ND |
| 2019-07-11 | 9590-013-1232 | ND |
| 2019-07-11 | 9590-015-1357 | ND |
| 2019-07-11 | 9590-018-1325 | ND |
| 2019-07-11 | 9590-087-1030 | ND |
| 2019-07-11 | 9590-097-1331 | ND |
| 2019-07-11 | 9590-111-1300 | ND |
| 2019-07-11 | 9590-248-0830 | ND |
| 2019-07-15 | 9590-001-0950 | ND |
| 2019-07-15 | 9590-101-1000 | ND |
| 2019-07-15 | 9590-102-1300 | ND |
| 2019-07-17 | 9590-080-1120 | ND |
| 2019-07-17 | 9590-085-1340 | ND |
| 2019-07-18 | 9590-061-1220 | ND |
| 2019-07-18 | 9590-065-0828 | ND |
| 2019-07-18 | 9590-066-1040 | ND |
| 2019-07-22 | 9590-081-0820 | ND |
| 2019-07-22 | 9590-133-1000 | ND |
| 2019-07-23 | 9590-144-1320 | ND |
| 2019-07-24 | 9590-146-1125 | ND |
| 2019-07-30 | 9590-011-1401 | ND |
| 2019-08-28 | 9590-240-1151 | ND |
| 2019-09-16 | 9590-007-1405 | ND |
| 2019-09-17 | 9590-082-1140 | ND |
| 2019-09-17 | 9590-106-1310 | ND |
| 2019-09-25 | 9590-250-1045 | ND |
| 2019-10-07 | 9590-020-1325 | ND |
| 2019-10-09 | 9590-065-0940 | ND |
| 2019-10-09 | 9590-081-1350 | 0.920 ppb |
| 2019-10-15 | 9590-104-0830 | 2.10 ppb |
| 2019-10-15 | 9590-105-0833 | 2.10 ppb |
| 2019-10-28 | 9590-246-0931 | 0.750 ppb |
| 2019-11-04 | 9590-018-1445 | ND |
| 2019-11-05 | 9590-075-0940 | 2.40 ppb |
| 2019-12-05 | 9590-130-1400 | ND |
| 2019-12-19 | 9590-250-1100 | ND |