Chemical and radiological sample results

MS0230015 , Stennis Space Center

46 of the 76 analytes this system has been tested for have been detected at least once, across 848 samples on record.

The other 30 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 848 samples on record, detections range from August 11, 1992 to April 21, 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 Stennis Space Center, 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	237 of 368 results	Aug 11, 1992	Aug 12, 2024
Copper, Free 1022	Inorganic Chemical	233 of 368 results	Aug 11, 1992	Aug 12, 2024
TTHM 2950	Organic Chemical	91 of 91 results	May 26, 2004	Aug 12, 2025
Chloroform 2941	Organic Chemical	83 of 83 results	Sep 6, 2006	Aug 12, 2025
Bromodichloromethane 2943	Organic Chemical	80 of 83 results	Sep 6, 2006	Aug 12, 2025
Dibromochloromethane 2944	Organic Chemical	80 of 83 results	Sep 6, 2006	Aug 12, 2025
Fluoride 1025	Inorganic Chemical	51 of 51 results	Jun 25, 2002	Apr 9, 2025
Barium 1010	Inorganic Chemical	48 of 48 results	Jun 25, 2002	Apr 9, 2025
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	37 of 37 results	Aug 2, 2004	Apr 21, 2026
Dichloroacetic Acid 2451	Organic Chemical	28 of 28 results	Jun 23, 2008	Apr 21, 2026
Trichloroacetic Acid 2452	Organic Chemical	28 of 28 results	Jun 23, 2008	Apr 21, 2026
Chromium 1020	Inorganic Chemical	27 of 48 results	Jun 25, 2002	Apr 9, 2025
Sodium 1052	Inorganic Chemical	15 of 15 results	Jun 12, 2008	Jan 30, 2024
Nickel 1036	Inorganic Chemical	12 of 48 results	Apr 7, 2008	Apr 9, 2025
Sulfate 1055	Inorganic Chemical	11 of 11 results	Jun 25, 2002	Feb 18, 2010
Gross Alpha, Incl. Radon & U 4002	Radionuclide	7 of 8 results	Mar 5, 2012	Jan 29, 2020
Dibromoacetic Acid 2454	Organic Chemical	6 of 28 results	Sep 8, 2009	Jun 25, 2014
Gross Alpha Particle Activity 4109	Radionuclide	6 of 9 results	Jun 19, 2012	Jan 15, 2013
Monochloroacetic Acid 2450	Organic Chemical	5 of 28 results	Jun 9, 2009	Dec 7, 2009
Arsenic 1005	Inorganic Chemical	4 of 48 results	Nov 28, 2011	Apr 9, 2025
Cyanide 1024	Inorganic Chemical	3 of 61 results	Nov 28, 2011	Jul 10, 2023
Nitrate-Nitrite 1038	Inorganic Chemical	3 of 104 results	Jun 2, 2008	Feb 2, 2011
Nitrate 1040	Inorganic Chemical	3 of 104 results	Jun 2, 2008	Feb 2, 2011
Calcium 1016	Inorganic Chemical	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Chloride 1017	Inorganic Chemical	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Manganese 1032	Inorganic Chemical	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Potassium 1042	Inorganic Chemical	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Residue, Total, Filterable 1057	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Alkalinity, Caco3 Stability 1067	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Carbon Dioxide 1901	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Color 1905	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Hardness, Total (As Caco3) 1915	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
PH 1925	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Alkalinity, Total 1927	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Calculated Sodium NACA	Water Quality	3 of 3 results	Jun 12, 2008	Feb 18, 2010
Carbon Tetrachloride 2982	Organic Chemical	2 of 77 results	Jul 20, 2004	Mar 13, 2023
Radium-226 4020	Radionuclide	2 of 15 results	Dec 8, 2015	Jan 29, 2020
Styrene 2996	Organic Chemical	2 of 77 results	Sep 29, 2005	Jun 4, 2018
Nitrite 1041	Inorganic Chemical	2 of 104 results	Aug 10, 2005	Feb 1, 2012
PH, Field Result PHFD	Water Quality	2 of 2 results	Jun 12, 2008	Jun 12, 2008
Cadmium 1015	Inorganic Chemical	2 of 48 results	Mar 9, 2005	Mar 9, 2005
Selenium 1045	Inorganic Chemical	2 of 48 results	Mar 9, 2005	Mar 9, 2005
Xylenes, Total 2955	Organic Chemical	1 of 77 results	Jun 4, 2018	Jun 4, 2018
Combined Radium (-226 & -228) 4010	Radionuclide	1 of 15 results	Dec 8, 2015	Dec 8, 2015
Iron 1028	Inorganic Chemical	1 of 3 results	Feb 18, 2010	Feb 18, 2010
Magnesium 1031	Inorganic Chemical	1 of 3 results	Feb 18, 2010	Feb 18, 2010

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 111–120 of 848 samples, newest first — collected July 8, 2021 to October 25, 2022. The summary above covers all 848.

38 results from the 10 samples listed here: 8 detected, 30 not detected. Across the whole record it is 1,152 of 4,036. 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 Stennis Space Center, every result from 111 to 120 of 848 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 Oct 25, 2022 09:48 Sampling point TF110 Treatment Facility TF110 Sample type Routine Lab sample VO-221026-007 Laboratory MSDH Lab
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,2,4-Trichlorobenzene 2378 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Cis-1,2-Dichloroethylene 2380 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Xylenes, Total 2955 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Dichloromethane 2964 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	O-Dichlorobenzene 2968 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	P-Dichlorobenzene 2969 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Vinyl Chloride 2976 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,1-Dichloroethylene 2977 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Trans-1,2-Dichloroethylene 2979 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,2-Dichloroethane 2980 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,1,1-Trichloroethane 2981 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Carbon Tetrachloride 2982 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,2-Dichloropropane 2983 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Trichloroethylene 2984 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	1,1,2-Trichloroethane 2985 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Tetrachloroethylene 2987 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Chlorobenzene 2989 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Benzene 2990 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Toluene 2991 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Ethylbenzene 2992 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Oct 25, 2022 09:48, sampling point TF110	Styrene 2996 EPA method 524.2	Oct 1, 2022 – Dec 31, 2022
Collected Aug 22, 2022 10:10 Sampling point TF111 Treatment Facility TF111 Sample type Routine Lab sample CN-220823-009 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Aug 22, 2022 10:10, sampling point TF111	Cyanide 1024 EPA method QC10204001X	Jul 1, 2022 – Sep 30, 2022
Collected Aug 22, 2022 10:35 Sampling point TF110 Treatment Facility TF110 Sample type Routine Lab sample CN-220823-010 Laboratory MSDH Lab
0.0248 mg/l , sample collected Aug 22, 2022 10:35, sampling point TF110	Cyanide 1024 EPA method QC10204001X	Jul 1, 2022 – Sep 30, 2022
Collected Feb 23, 2022 13:24 Sampling point TF105 Treatment Facility TF105 Sample type Routine Lab sample RU-220224-014 Laboratory MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 23, 2022 13:24, sampling point TF105	Combined Uranium 4006 EPA method 200.8	Jan 1, 2014 – Dec 31, 2022
Collected Jan 24, 2022 12:35 Sampling point TF105 Treatment Facility TF105 Sample type Routine Lab sample NI-220125-006 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:35, sampling point TF105	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:35, sampling point TF105	Nitrate 1040 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:35, sampling point TF105	Nitrite 1041 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Collected Jan 24, 2022 12:20 Sampling point TF104 Sample type Routine Lab sample NI-220125-005 Laboratory MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:20, sampling point TF104	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:20, sampling point TF104	Nitrate 1040 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 24, 2022 12:20, sampling point TF104	Nitrite 1041 EPA method QC10107041C	Jan 1, 2022 – Dec 31, 2022
Collected Jul 8, 2021 07:55 Sampling point LC0004 Location withheld Sample type Routine Lab sample PB-210709-114 Laboratory MSDH Lab
0.295 mg/l , sample collected Jul 8, 2021 07:55, sampling point LC0004	Copper, Free 1022 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
3.5 ug/l , sample collected Jul 8, 2021 07:55, sampling point LC0004	Lead 1030 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
Collected Jul 8, 2021 08:17 Sampling point LC0003 Location withheld Sample type Routine Lab sample PB-210709-113 Laboratory MSDH Lab
0.0298 mg/l , sample collected Jul 8, 2021 08:17, sampling point LC0003	Copper, Free 1022 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
0.7 ug/l , sample collected Jul 8, 2021 08:17, sampling point LC0003	Lead 1030 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
Collected Jul 8, 2021 09:21 Sampling point LC0040 Location withheld Sample type Routine Lab sample PB-210709-053 Laboratory MSDH Lab
0.0134 mg/l , sample collected Jul 8, 2021 09:21, sampling point LC0040	Copper, Free 1022 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Jul 8, 2021 09:21, sampling point LC0040	Lead 1030 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
Collected Jul 8, 2021 08:32 Sampling point LC0042 Location withheld Sample type Routine Lab sample PB-210709-052 Laboratory MSDH Lab
0.194 mg/l , sample collected Jul 8, 2021 08:32, sampling point LC0042	Copper, Free 1022 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021
1.3 ug/l , sample collected Jul 8, 2021 08:32, sampling point LC0042	Lead 1030 EPA method 200.8	Jan 1, 2019 – Dec 31, 2021

Collected
Oct 25, 2022 09:48

Sampling point
TF110 Treatment Facility TF110

Sample type
Routine

Lab sample
VO-221026-007

Laboratory
MSDH Lab

Monitoring period
Oct 1, 2022 – Dec 31, 2022
- 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 0.5 ug/l Minimum Reporting Level
- Dichloromethane 2964 EPA method 524.2
  
  Result
  Not detected below 0.5 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
Aug 22, 2022 10:10

Sampling point
TF111 Treatment Facility TF111

Sample type
Routine

Lab sample
CN-220823-009

Laboratory
MSDH Lab

Monitoring period
Jul 1, 2022 – Sep 30, 2022
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Aug 22, 2022 10:35

Sampling point
TF110 Treatment Facility TF110

Sample type
Routine

Lab sample
CN-220823-010

Laboratory
MSDH Lab

Monitoring period
Jul 1, 2022 – Sep 30, 2022
- Cyanide 1024 EPA method QC10204001X
  
  Result
  0.0248 mg/l
Collected
Feb 23, 2022 13:24

Sampling point
TF105 Treatment Facility TF105

Sample type
Routine

Lab sample
RU-220224-014

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2014 – Dec 31, 2022
- Combined Uranium 4006 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
Collected
Jan 24, 2022 12:35

Sampling point
TF105 Treatment Facility TF105

Sample type
Routine

Lab sample
NI-220125-006

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2022
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Jan 24, 2022 12:20

Sampling point
TF104

Sample type
Routine

Lab sample
NI-220125-005

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2022
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  Not detected below 0.1 mg/l Minimum Reporting Level
- Nitrate 1040 EPA method QC10107041C
  
  Result
  Not detected below 0.08 mg/l Minimum Reporting Level
- Nitrite 1041 EPA method QC10107041C
  
  Result
  Not detected below 0.02 mg/l Minimum Reporting Level
Collected
Jul 8, 2021 07:55

Sampling point
LC0004 Location withheld

Sample type
Routine

Lab sample
PB-210709-114

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2019 – Dec 31, 2021
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.295 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  3.5 ug/l
Collected
Jul 8, 2021 08:17

Sampling point
LC0003 Location withheld

Sample type
Routine

Lab sample
PB-210709-113

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2019 – Dec 31, 2021
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.0298 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  0.7 ug/l
Collected
Jul 8, 2021 09:21

Sampling point
LC0040 Location withheld

Sample type
Routine

Lab sample
PB-210709-053

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2019 – Dec 31, 2021
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.0134 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  Not detected below 0.5 ug/l Minimum Reporting Level
Collected
Jul 8, 2021 08:32

Sampling point
LC0042 Location withheld

Sample type
Routine

Lab sample
PB-210709-052

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2019 – Dec 31, 2021
- Copper, Free 1022 EPA method 200.8
  
  Result
  0.194 mg/l
- Lead 1030 EPA method 200.8
  
  Result
  1.3 ug/l

Routine (10).