Chemical and radiological sample results

MS0760076 ·, Black Bayou Water Assn.

What has been detected, ever

Every analyte measured above its reporting level at any point in this system’s record, most often detected first. This is not limited to the samples listed below.

Scroll the table sideways for the dates.

No date range is applied: this list draws on every sample on record. Show the last two years only.

The most recent samples, result by result

The table below lists 1–10 of 1,097 samples, newest first — collected February 10, 2026 to July 22, 2026. The summary above covers all 1,097.

82 results from the 10 samples listed here: 27 detected, 55 not detected. Across the whole record it is 1,488 of 8,173. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

We withheld the location of 1 sampling point below. The location on record identifies a private home, and we do not publish those. That is our decision, not the agency’s. The sampling point, its type and every result taken there are published unchanged.

• Collected

  Jul 22, 2026

  Sampling point

  TF115 Treatment Plant T103

  Sample type

  Routine

  Lab sample

  35052964002

  Laboratory

  Pace Analytical Services, LLC

  Monitoring period

  Jan 1, 2026 – Dec 31, 2031

  • Cyanide 1024 EPA method 335.4

    Result

    Not detected below 0.01 mg/l Minimum Reporting Level

• Collected

  Jul 22, 2026

  Sampling point

  TF080 TF080 Lake Jackson

  Sample type

  Routine

  Lab sample

  35052964001

  Laboratory

  Pace Analytical Services, LLC

  • Cyanide 1024 EPA method 335.4

    Result

    Not detected below 0.01 mg/l Minimum Reporting Level

    Monitoring period

    Jan 1, 2026 – Dec 31, 2031

  • Nitrate-Nitrite 1038

    Result

    0.3 mg/l

    Monitoring period

    Not recorded

  • Nitrate 1040 EPA method 353.2

    Result

    0.3 mg/l

    Monitoring period

    Not recorded

  • Nitrite 1041 EPA method 353.2

    Result

    Not detected below 0.05 mg/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Sodium 1052 EPA method 200.7

    Result

    277000 ug/l

    Monitoring period

    Jan 1, 2024 – Dec 31, 2026

• Collected

  Jun 29, 2026

  Sampling point

  TF101 Treatment Plant T101

  Sample type

  Routine

  Lab sample

  35047519003

  Laboratory

  Pace Analytical Services, LLC

  Monitoring period

  Not recorded

  • Fluoride 1025 EPA method 300.0

    Result

    0.38 mg/l

• Collected

  Jun 29, 2026

  Sampling point

  TF102 Treatment Plant T102

  Sample type

  Routine

  Lab sample

  35047519002

  Laboratory

  Pace Analytical Services, LLC

  Monitoring period

  Apr 1, 2026 – Jun 30, 2026

  • Fluoride 1025 EPA method 300.0

    Result

    0.3 mg/l

• Collected

  Jun 29, 2026

  Sampling point

  TF115 Treatment Plant T103

  Sample type

  Routine

  Lab sample

  35047519001

  Laboratory

  Pace Analytical Services, LLC

  Monitoring period

  Jan 1, 2026 – Dec 31, 2026

  • 1,2,4-Trichlorobenzene 2378 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Cis-1,2-Dichloroethylene 2380 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Xylenes, Total 2955 EPA method 524.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Dichloromethane 2964 EPA method 524.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • O-Dichlorobenzene 2968 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • P-Dichlorobenzene 2969 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Vinyl Chloride 2976 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • 1,1-Dichloroethylene 2977 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Trans-1,2-Dichloroethylene 2979 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • 1,2-Dichloroethane 2980 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • 1,1,1-Trichloroethane 2981 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Carbon Tetrachloride 2982 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • 1,2-Dichloropropane 2983 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Trichloroethylene 2984 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • 1,1,2-Trichloroethane 2985 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Tetrachloroethylene 2987 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Chlorobenzene 2989 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Benzene 2990 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Toluene 2991 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Ethylbenzene 2992 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Styrene 2996 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

• Collected

  Jun 12, 2026

  Sampling point

  TF101 Treatment Plant T101

  Sample type

  Routine

  Lab sample

  35045454002

  Laboratory

  Pace Analytical Services, LLC

  • Arsenic 1005 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Barium 1010 EPA method 200.7

    Result

    34.1 ug/l

    Monitoring period

    Not recorded

  • Cadmium 1015 EPA method 200.7

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Chromium 1020 EPA method 200.7

    Result

    Not detected below 5 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Mercury 1035 EPA method 245.1

    Result

    Not detected below 0.2 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Selenium 1045 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Sodium 1052 EPA method 200.7

    Result

    259000 ug/l

    Monitoring period

    Jan 1, 2024 – Dec 31, 2026

  • Antimony, Total 1074 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Beryllium, Total 1075 EPA method 200.7

    Result

    Not detected below 4 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

  • Thallium, Total 1085 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Not recorded

• Collected

  Jun 12, 2026

  Sampling point

  TF102 Treatment Plant T102

  Sample type

  Routine

  Lab sample

  35045454001

  Laboratory

  Pace Analytical Services, LLC

  • Arsenic 1005 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Barium 1010 EPA method 200.7

    Result

    Not detected below 10 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Cadmium 1015 EPA method 200.7

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Chromium 1020 EPA method 200.7

    Result

    Not detected below 5 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Mercury 1035 EPA method 245.1

    Result

    Not detected below 0.2 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Selenium 1045 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Sodium 1052 EPA method 200.7

    Result

    150000 ug/l

    Monitoring period

    Jan 1, 2024 – Dec 31, 2026

  • Antimony, Total 1074 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Beryllium, Total 1075 EPA method 200.7

    Result

    Not detected below 4 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

  • Thallium, Total 1085 EPA method 200.8

    Result

    Not detected below 1 ug/l Minimum Reporting Level

    Monitoring period

    Apr 1, 2026 – Jun 30, 2026

• Collected

  Feb 25, 2026 12:30

  Sampling point

  SM2 SM2

  Sample type

  Routine

  Lab sample

  810-182167-2

  Laboratory

  Eurofins Eaton Analytical South Bend in

  Monitoring period

  Not recorded

  • Monochloroacetic Acid 2450 EPA method 552.2

    Result

    Not detected below 2 ug/l Minimum Reporting Level

  • Dichloroacetic Acid 2451 EPA method 552.2

    Result

    12 ug/l

  • Trichloroacetic Acid 2452 EPA method 552.2

    Result

    23 ug/l

  • Monobromoacetic Acid 2453 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Dibromoacetic Acid 2454 EPA method 552.2

    Result

    1.2 ug/l

  • Total Haloacetic Acids (Haa5) 2456 EPA method 552.2

    Result

    36.2 ug/l

  • Chloroform 2941 EPA method 524.2

    Result

    42 ug/l

  • Bromoform 2942 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Bromodichloromethane 2943 EPA method 524.2

    Result

    18 ug/l

  • Dibromochloromethane 2944 EPA method 524.2

    Result

    6.7 ug/l

  • TTHM 2950 EPA method 524.2

    Result

    66.7 ug/l

• Collected

  Feb 25, 2026 12:30

  Sampling point

  SM1 SM1

  Sample type

  Routine

  Lab sample

  810-182167-1

  Laboratory

  Eurofins Eaton Analytical South Bend in

  Monitoring period

  Not recorded

  • Monochloroacetic Acid 2450 EPA method 552.2

    Result

    Not detected below 2 ug/l Minimum Reporting Level

  • Dichloroacetic Acid 2451 EPA method 552.2

    Result

    8.6 ug/l

  • Trichloroacetic Acid 2452 EPA method 552.2

    Result

    13 ug/l

  • Monobromoacetic Acid 2453 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Dibromoacetic Acid 2454 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Total Haloacetic Acids (Haa5) 2456 EPA method 552.2

    Result

    21.6 ug/l

  • Chloroform 2941 EPA method 524.2

    Result

    11 ug/l

  • Bromoform 2942 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Bromodichloromethane 2943 EPA method 524.2

    Result

    3.4 ug/l

  • Dibromochloromethane 2944 EPA method 524.2

    Result

    1.1 ug/l

  • TTHM 2950 EPA method 524.2

    Result

    15.5 ug/l

• Collected

  Feb 10, 2026 15:00

  Sampling point

  SMT Location withheld

  Sample type

  Routine

  Lab sample

  810-180637-2

  Laboratory

  Eurofins Eaton Analytical South Bend in

  Monitoring period

  Not recorded

  • Monochloroacetic Acid 2450 EPA method 552.2

    Result

    Not detected below 2 ug/l Minimum Reporting Level

  • Dichloroacetic Acid 2451 EPA method 552.2

    Result

    2.7 ug/l

  • Trichloroacetic Acid 2452 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Monobromoacetic Acid 2453 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Dibromoacetic Acid 2454 EPA method 552.2

    Result

    Not detected below 1 ug/l Minimum Reporting Level

  • Total Haloacetic Acids (Haa5) 2456 EPA method 552.2

    Result

    2.7 ug/l

  • Chloroform 2941 EPA method 524.2

    Result

    2.7 ug/l

  • Bromoform 2942 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Bromodichloromethane 2943 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • Dibromochloromethane 2944 EPA method 524.2

    Result

    Not detected below 0.5 ug/l Minimum Reporting Level

  • TTHM 2950 EPA method 524.2

    Result

    2.7 ug/l

Routine (10).