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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

MS0070002 , Big Creek Water Association

23 of the 57 analytes this system has been tested for have been detected at least once, across 356 samples on record.

The other 34 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 356 samples on record, detections range from November 11, 1993 to July 31, 2026. These figures cover the whole record; the list of samples further down is narrowed.

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 Big Creek Water Association, 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 129 of 147 results Nov 11, 1993 Jul 31, 2026
Lead 1030 Inorganic Chemical 75 of 147 results Nov 11, 1993 Jun 22, 2022
Fluoride 1025 Inorganic Chemical 44 of 44 results Jun 25, 2002 Jul 30, 2026
Arsenic 1005 Inorganic Chemical 44 of 44 results Jun 25, 2002 Jun 11, 2026
Barium 1010 Inorganic Chemical 44 of 44 results Jun 25, 2002 Jun 11, 2026
Selenium 1045 Inorganic Chemical 37 of 44 results Jun 25, 2002 Jun 11, 2026
Nickel 1036 Inorganic Chemical 37 of 43 results Jun 25, 2002 Oct 8, 2025
Chromium 1020 Inorganic Chemical 31 of 44 results Jun 25, 2002 Oct 8, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 20 of 32 results Jun 27, 2007 Mar 26, 2025
TTHM 2950 Organic Chemical 15 of 30 results Jun 27, 2007 Oct 11, 2023
Gross Alpha, Incl. Radon & U 4002 Radionuclide 12 of 12 results Dec 8, 2011 Mar 14, 2016
Combined Radium (-226 & -228) 4010 Radionuclide 11 of 12 results Dec 8, 2011 Mar 14, 2016
Radium-226 4020 Radionuclide 11 of 12 results Dec 8, 2011 Mar 14, 2016
Nitrate 1040 Inorganic Chemical 9 of 43 results May 3, 2004 Mar 14, 2016
Nitrate-Nitrite 1038 Inorganic Chemical 7 of 43 results Jul 18, 2005 Mar 14, 2016
Sodium 1052 Inorganic Chemical 6 of 6 results Sep 20, 2019 Jun 11, 2026
Radium-228 4030 Radionuclide 6 of 12 results Dec 8, 2011 Mar 14, 2016
Nitrite 1041 Inorganic Chemical 6 of 43 results Jul 18, 2005 Jan 18, 2011
Dibromoacetic Acid 2454 Organic Chemical 4 of 7 results Aug 13, 2008 Jun 4, 2019
Bromoform 2942 Organic Chemical 3 of 8 results Aug 4, 2014 Sep 6, 2017
Dichloroacetic Acid 2451 Organic Chemical 1 of 7 results Jun 4, 2019 Jun 4, 2019
Monobromoacetic Acid 2453 Organic Chemical 1 of 7 results Jun 4, 2019 Jun 4, 2019
Dibromochloromethane 2944 Organic Chemical 1 of 8 results Aug 4, 2014 Aug 4, 2014

Showing samples collected between September 25, 2024 and September 25, 2026. That is this page’s default, not a limit on what the agency records.

Show every sample on record

Choose a date range

The most recent samples, result by result

The table below lists 1–10 of 20 samples, newest first — collected September 9, 2025 to July 31, 2026. The summary above covers all 20.

36 results from the 10 samples listed here: 16 detected, 20 not detected. Across the whole record it is 554 of 1,415. 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 Big Creek Water Association, every result from 1 to 10 of 20 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
Jul 31, 2026
Sampling point
LC0013 Location withheld
Sample type
Routine
Lab sample
35055010004
Laboratory
Pace Analytical Services, LLC
91 ug/l , sample collected Jul 31, 2026, sampling point LC0013 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 31, 2026, sampling point LC0013 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Collected
Jul 30, 2026
Sampling point
LC0006 Location withheld
Sample type
Routine
Lab sample
35055010005
Laboratory
Pace Analytical Services, LLC
63.3 ug/l , sample collected Jul 30, 2026, sampling point LC0006 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 30, 2026, sampling point LC0006 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Collected
Jul 30, 2026
Sampling point
LC0001 Location withheld
Sample type
Routine
Lab sample
35055010003
Laboratory
Pace Analytical Services, LLC
282 ug/l , sample collected Jul 30, 2026, sampling point LC0001 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 30, 2026, sampling point LC0001 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Collected
Jul 30, 2026
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
35055010002
Laboratory
Pace Analytical Services, LLC
115 ug/l , sample collected Jul 30, 2026, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 30, 2026, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Collected
Jul 30, 2026
Sampling point
LC0012 Location withheld
Sample type
Routine
Lab sample
35055010001
Laboratory
Pace Analytical Services, LLC
5.1 ug/l , sample collected Jul 30, 2026, sampling point LC0012 Copper, Free 1022 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 30, 2026, sampling point LC0012 Lead 1030 EPA method 200.8 Jan 1, 2025 – Dec 31, 2027
Collected
Jul 30, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35055120001
Laboratory
Pace Analytical Services, LLC
0.45 mg/l , sample collected Jul 30, 2026, sampling point TF102 Fluoride 1025 EPA method 300.0 Not recorded
Collected
Jun 30, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35047595001
Laboratory
Pace Analytical Services, LLC
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2026 – Dec 31, 2026
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected Jun 30, 2026, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2026 – Dec 31, 2026
Collected
Jun 11, 2026
Sampling point
TF102 Treatment Plant T102
Sample type
Routine
Lab sample
35043610001
Laboratory
Pace Analytical Services, LLC
1.3 ug/l , sample collected Jun 11, 2026, sampling point TF102 Arsenic 1005 EPA method 200.8 Not recorded
108 ug/l , sample collected Jun 11, 2026, sampling point TF102 Barium 1010 EPA method 200.7 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Cadmium 1015 EPA method 200.7 Not recorded
Not detected below 5 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Chromium 1020 EPA method 200.7 Not recorded
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Mercury 1035 EPA method 245.1 Not recorded
2.9 ug/l , sample collected Jun 11, 2026, sampling point TF102 Selenium 1045 EPA method 200.8 Not recorded
256000 ug/l , sample collected Jun 11, 2026, sampling point TF102 Sodium 1052 EPA method 200.7 Jan 1, 2026 – Dec 31, 2028
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Not recorded
Not detected below 4 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Beryllium, Total 1075 EPA method 200.7 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 11, 2026, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Not recorded
Collected
Oct 8, 2025 12:20
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-251009-002
Laboratory
MSDH Lab
0.0041 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Arsenic 1005 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
0.102 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Barium 1010 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2025 12:20, sampling point TF101 Cadmium 1015 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
0.0008 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Chromium 1020 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
0.401 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Oct 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2025 12:20, sampling point TF101 Mercury 1035 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
0.0007 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
0.006 mg/l , sample collected Oct 8, 2025 12:20, sampling point TF101 Selenium 1045 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2025 12:20, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2025 12:20, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Oct 8, 2025 12:20, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Oct 1, 2025 – Dec 31, 2025
Collected
Sep 9, 2025 16:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250910-008
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 9, 2025 16:30, sampling point TF101 Mercury 1035 EPA method 200.8 Jul 1, 2025 – Sep 30, 2025

Routine (10).