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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.

Chemical and radiological sample results

MS0760044 , Delta Branch Experiment Sta

22 of the 53 analytes this system has been tested for have been detected at least once, across 176 samples on record.

The other 31 were tested for and never found. An analyte is counted here if any result on record measured it, so this covers the whole history and not the samples listed below.

Across all 176 samples on record, detections range from November 3, 2003 to August 2, 2026. These figures cover the whole record.

What counts as a non-detect is defined in the help: Less than Indicator. This system’s violations.

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.

Every analyte ever detected for Delta Branch Experiment Sta, with how many results found it and when it was first and last detected. Covers the whole record, not only the samples listed below.
Analyte Kind Detected in First detected Last detected
Copper, Free 1022 Inorganic Chemical 69 of 69 results Jul 12, 2007 Aug 12, 2025
Lead 1030 Inorganic Chemical 37 of 69 results Jul 12, 2007 Aug 12, 2025
TTHM 2950 Organic Chemical 27 of 27 results Sep 20, 2004 Mar 28, 2023
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 24 of 26 results Nov 17, 2004 Oct 3, 2022
Chloroform 2941 Organic Chemical 17 of 18 results May 22, 2006 Aug 16, 2017
Barium 1010 Inorganic Chemical 11 of 11 results Nov 3, 2003 Aug 2, 2026
Dichloroacetic Acid 2451 Organic Chemical 11 of 11 results Feb 26, 2008 Aug 16, 2017
Chromium 1020 Inorganic Chemical 9 of 11 results Nov 3, 2003 Aug 2, 2026
Fluoride 1025 Inorganic Chemical 9 of 11 results Nov 3, 2003 Aug 2, 2026
Bromodichloromethane 2943 Organic Chemical 9 of 18 results May 22, 2006 Aug 8, 2011
Dibromochloromethane 2944 Organic Chemical 8 of 18 results Aug 14, 2006 Aug 8, 2011
Nickel 1036 Inorganic Chemical 3 of 10 results Nov 3, 2003 May 29, 2013
Arsenic 1005 Inorganic Chemical 2 of 11 results Apr 12, 2004 Mar 31, 2025
Trichloroacetic Acid 2452 Organic Chemical 2 of 11 results Feb 26, 2008 Jun 3, 2008
Selenium 1045 Inorganic Chemical 2 of 11 results Apr 12, 2004 Apr 17, 2006
Sodium 1052 Inorganic Chemical 1 of 1 result Apr 3, 2023 Apr 3, 2023
Monochloroacetic Acid 2450 Organic Chemical 1 of 11 results Jul 21, 2014 Jul 21, 2014
Dibromoacetic Acid 2454 Organic Chemical 1 of 11 results Aug 8, 2011 Aug 8, 2011
Bromoform 2942 Organic Chemical 1 of 18 results Aug 8, 2011 Aug 8, 2011
Monobromoacetic Acid 2453 Organic Chemical 1 of 11 results Feb 5, 2009 Feb 5, 2009
Nitrite 1041 Inorganic Chemical 1 of 21 results Jul 28, 2008 Jul 28, 2008
Sulfate 1055 Inorganic Chemical 1 of 2 results Nov 3, 2003 Nov 3, 2003

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 176 samples, newest first — collected March 31, 2025 to August 2, 2026. The summary above covers all 176.

35 results from the 10 samples listed here: 16 detected, 19 not detected. Across the whole record it is 247 of 665. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Units in this table

Antimony, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Arsenic is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Barium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Beryllium, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Cadmium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chromium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Mercury is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Selenium is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Thallium, Total is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

We withheld the location of 5 sampling points 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.

Chemical and radiological sample results for Delta Branch Experiment Sta, every result from 1 to 10 of 176 samples shown, newest first. Not detected means the amount was below the level the laboratory can reliably report, which is given beside it.
Result Analyte Monitoring period
Collected
Aug 2, 2026
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
35055542001
Laboratory
Pace Analytical Services, LLC
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
5.6 ug/l , sample collected Aug 2, 2026, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
9.1 ug/l , sample collected Aug 2, 2026, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
0.54 mg/l , sample collected Aug 2, 2026, sampling point TF101 Fluoride 1025 EPA method 300.0 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Mercury 1035 EPA method 245.1 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 0.1 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Not detected below 1 ug/l Minimum Reporting Level , sample collected Aug 2, 2026, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2026 – Dec 31, 2031
Collected
Dec 8, 2025 13:55
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
CN-251209-010
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Dec 8, 2025 13:55, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Sep 22, 2025 14:45
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250923-040
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 22, 2025 14:45, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 12, 2025 07:50
Sampling point
LC0002 Location withheld
Sample type
Routine
Lab sample
PB-250813-015
Laboratory
MSDH Lab
0.0965 mg/l , sample collected Aug 12, 2025 07:50, sampling point LC0002 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.9 ug/l , sample collected Aug 12, 2025 07:50, sampling point LC0002 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 12, 2025 14:29
Sampling point
LC0005 Location withheld
Sample type
Routine
Lab sample
PB-250813-013
Laboratory
MSDH Lab
0.0223 mg/l , sample collected Aug 12, 2025 14:29, sampling point LC0005 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Aug 12, 2025 14:29, sampling point LC0005 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 12, 2025 08:00
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-250813-012
Laboratory
MSDH Lab
0.0916 mg/l , sample collected Aug 12, 2025 08:00, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1.8 ug/l , sample collected Aug 12, 2025 08:00, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 12, 2025 06:22
Sampling point
LC0003 Location withheld
Sample type
Routine
Lab sample
PB-250813-011
Laboratory
MSDH Lab
0.0372 mg/l , sample collected Aug 12, 2025 06:22, sampling point LC0003 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.7 ug/l , sample collected Aug 12, 2025 06:22, sampling point LC0003 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Aug 12, 2025 07:16
Sampling point
LC0006 Location withheld
Sample type
Routine
Lab sample
PB-250813-014
Laboratory
MSDH Lab
0.0536 mg/l , sample collected Aug 12, 2025 07:16, sampling point LC0006 Copper, Free 1022 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
1.2 ug/l , sample collected Aug 12, 2025 07:16, sampling point LC0006 Lead 1030 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Apr 14, 2025 13:22
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250415-040
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 13:22, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 13:22, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Apr 14, 2025 13:22, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Mar 31, 2025 14:18
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250401-037
Laboratory
MSDH Lab
0.0005 mg/l , sample collected Mar 31, 2025 14:18, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0046 mg/l , sample collected Mar 31, 2025 14:18, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0008 mg/l , sample collected Mar 31, 2025 14:18, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.592 mg/l , sample collected Mar 31, 2025 14:18, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Mar 31, 2025 14:18, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025

Routine (10).