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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

MS0240066 , Pass Christian Isles

40 of the 74 analytes this system has been tested for have been detected at least once, across 401 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 401 samples on record, detections range from November 2, 1993 to February 11, 2025. 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 Pass Christian Isles, 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
Lead 1030 Inorganic Chemical 137 of 185 results Nov 2, 1993 Oct 17, 2024
Copper, Free 1022 Inorganic Chemical 135 of 185 results Nov 2, 1993 Oct 17, 2024
Barium 1010 Inorganic Chemical 24 of 24 results Sep 15, 2003 Feb 11, 2025
Fluoride 1025 Inorganic Chemical 24 of 25 results Sep 15, 2003 Feb 11, 2025
Chromium 1020 Inorganic Chemical 14 of 24 results Sep 15, 2003 Apr 27, 2022
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 15 results Mar 5, 2012 Oct 4, 2012
Xylenes, Total 2955 Organic Chemical 9 of 72 results Jan 21, 2004 Jul 16, 2013
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 8 of 8 results Jul 21, 2004 Feb 11, 2025
TTHM 2950 Organic Chemical 8 of 8 results May 24, 2004 Feb 11, 2025
Sulfate 1055 Inorganic Chemical 6 of 7 results Sep 15, 2003 Dec 3, 2008
Chloroform 2941 Organic Chemical 5 of 5 results Aug 2, 2007 Jul 31, 2018
Bromodichloromethane 2943 Organic Chemical 4 of 5 results Aug 2, 2007 Jul 31, 2018
Selenium 1045 Inorganic Chemical 4 of 24 results Mar 7, 2005 Apr 9, 2008
Sodium 1052 Inorganic Chemical 3 of 3 results Dec 3, 2008 Feb 23, 2021
Dichloroacetic Acid 2451 Organic Chemical 3 of 4 results Sep 18, 2008 Sep 17, 2014
Dibromochloromethane 2944 Organic Chemical 3 of 5 results Aug 2, 2007 Sep 17, 2014
Ethylbenzene 2992 Organic Chemical 3 of 72 results Jan 21, 2004 May 8, 2012
Trichloroacetic Acid 2452 Organic Chemical 2 of 4 results Jul 17, 2012 Sep 17, 2014
Nickel 1036 Inorganic Chemical 2 of 24 results Jan 30, 2006 Jan 14, 2009
Monochloroacetic Acid 2450 Organic Chemical 1 of 4 results Jul 31, 2018 Jul 31, 2018
Dibromoacetic Acid 2454 Organic Chemical 1 of 4 results Jul 17, 2012 Jul 17, 2012
Calcium 1016 Inorganic Chemical 1 of 1 result Dec 3, 2008 Dec 3, 2008
Chloride 1017 Inorganic Chemical 1 of 1 result Dec 3, 2008 Dec 3, 2008
Manganese 1032 Inorganic Chemical 1 of 1 result Dec 3, 2008 Dec 3, 2008
Potassium 1042 Inorganic Chemical 1 of 1 result Dec 3, 2008 Dec 3, 2008
Residue, Total, Filterable 1057 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Carbon Dioxide 1901 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Color 1905 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Hardness, Total (As Caco3) 1915 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
PH 1925 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Alkalinity, Total 1927 Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Calculated Sodium NACA Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
PH, Field Result PHFD Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Temperature, Field Result TEMP Water Quality 1 of 1 result Dec 3, 2008 Dec 3, 2008
Carbon Tetrachloride 2982 Organic Chemical 1 of 72 results Oct 15, 2008 Oct 15, 2008
Nitrate 1040 Inorganic Chemical 1 of 52 results Aug 17, 2006 Aug 17, 2006
Mercury 1035 Inorganic Chemical 1 of 24 results Jan 30, 2006 Jan 30, 2006
Arsenic 1005 Inorganic Chemical 1 of 24 results Mar 7, 2005 Mar 7, 2005
Cadmium 1015 Inorganic Chemical 1 of 24 results Sep 15, 2003 Sep 15, 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 401 samples, newest first — collected October 16, 2024 to August 25, 2025. The summary above covers all 401.

37 results from the 10 samples listed here: 11 detected, 26 not detected. Across the whole record it is 425 of 2,481. 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 4 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 Pass Christian Isles, every result from 1 to 10 of 401 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 25, 2025 10:00
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
CN-250826-010
Laboratory
MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 25, 2025 10:00, sampling point TF103 Cyanide 1024 EPA method QC10204001X Jan 1, 2023 – Dec 31, 2025
Collected
Feb 11, 2025 12:40
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
IN-250212-043
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0039 mg/l , sample collected Feb 11, 2025 12:40, sampling point TF103 Barium 1010 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.162 mg/l , sample collected Feb 11, 2025 12:40, sampling point TF103 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 Feb 11, 2025 12:40, sampling point TF103 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 Selenium 1045 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:40, sampling point TF103 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 Feb 11, 2025 12:40, sampling point TF103 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 Feb 11, 2025 12:40, sampling point TF103 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 11, 2025 12:30
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
IN-250212-042
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:30, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.0039 mg/l , sample collected Feb 11, 2025 12:30, 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 Feb 11, 2025 12:30, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:30, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
0.173 mg/l , sample collected Feb 11, 2025 12:30, 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 Feb 11, 2025 12:30, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:30, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 12:30, 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 Feb 11, 2025 12:30, 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 Feb 11, 2025 12:30, 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 Feb 11, 2025 12:30, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 11, 2025 09:30
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
HA-250212-002
Laboratory
MSDH Lab
17.1 ug/l , sample collected Feb 11, 2025 09:30, sampling point SMD Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 11, 2025 09:30
Sampling point
SMD Location withheld
Sample type
Routine
Lab sample
TH-250212-002
Laboratory
MSDH Lab
5.31 ug/l , sample collected Feb 11, 2025 09:30, sampling point SMD TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2025
Collected
Feb 11, 2025 08:50
Sampling point
TF103 Treatment Plant T103
Sample type
Routine
Lab sample
NI-250212-047
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 08:50, sampling point TF103 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 08:50, sampling point TF103 Nitrate 1040 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 08:50, sampling point TF103 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Feb 11, 2025 08:50
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
NI-250212-048
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 11, 2025 08:50, 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 Feb 11, 2025 08:50, 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 Feb 11, 2025 08:50, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2025 – Dec 31, 2025
Collected
Oct 17, 2024 05:30
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-241018-002
Laboratory
MSDH Lab
0.0088 mg/l , sample collected Oct 17, 2024 05:30, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 17, 2024 05:30, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 17, 2024 06:05
Sampling point
LC0004 Location withheld
Sample type
Routine
Lab sample
PB-241018-001
Laboratory
MSDH Lab
0.0104 mg/l , sample collected Oct 17, 2024 06:05, sampling point LC0004 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
7 ug/l , sample collected Oct 17, 2024 06:05, sampling point LC0004 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
Collected
Oct 16, 2024 06:50
Sampling point
LC0008 Location withheld
Sample type
Routine
Lab sample
PB-241018-005
Laboratory
MSDH Lab
0.205 mg/l , sample collected Oct 16, 2024 06:50, sampling point LC0008 Copper, Free 1022 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024
0.8 ug/l , sample collected Oct 16, 2024 06:50, sampling point LC0008 Lead 1030 EPA method 200.8 Jan 1, 2022 – Dec 31, 2024

Routine (10).