Chemical and radiological sample results

MS0090001 , Atlanta Water System, Inc.

21 of the 57 analytes this system has been tested for have been detected at least once, across 323 samples on record.

The other 36 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 323 samples on record, detections range from September 14, 1993 to July 19, 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 Atlanta Water System, Inc., 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	114 of 137 results	Sep 14, 1993	Sep 12, 2023
Copper, Free 1022	Inorganic Chemical	78 of 137 results	Sep 14, 1993	Sep 12, 2023
Fluoride 1025	Inorganic Chemical	24 of 24 results	Jul 23, 2002	Jul 19, 2026
Barium 1010	Inorganic Chemical	24 of 24 results	Jul 23, 2002	Jun 14, 2026
Selenium 1045	Inorganic Chemical	20 of 24 results	Jul 23, 2002	Jun 14, 2026
Arsenic 1005	Inorganic Chemical	14 of 24 results	Jul 23, 2002	Jan 14, 2025
TTHM 2950	Organic Chemical	12 of 22 results	Jul 9, 2007	Apr 20, 2026
Chromium 1020	Inorganic Chemical	12 of 24 results	Jul 23, 2002	Jan 14, 2025
Nitrate 1040	Inorganic Chemical	10 of 51 results	Aug 24, 2005	Feb 10, 2025
Gross Alpha, Incl. Radon & U 4002	Radionuclide	10 of 10 results	Dec 7, 2011	Jul 11, 2012
Sodium 1052	Inorganic Chemical	8 of 8 results	Oct 1, 2019	Jun 14, 2026
Bromoform 2942	Organic Chemical	8 of 16 results	Jul 9, 2007	Apr 20, 2026
Total Haloacetic Acids (Haa5) 2456	Organic Chemical	7 of 22 results	Jul 9, 2007	Apr 9, 2025
Nickel 1036	Inorganic Chemical	7 of 22 results	Feb 14, 2005	Jan 14, 2025
Dibromochloromethane 2944	Organic Chemical	6 of 16 results	Jul 9, 2007	Apr 20, 2026
Nitrate-Nitrite 1038	Inorganic Chemical	6 of 51 results	Aug 24, 2005	Feb 10, 2025
Nitrite 1041	Inorganic Chemical	2 of 51 results	Feb 10, 2025	Feb 10, 2025
Dibromoacetic Acid 2454	Organic Chemical	2 of 15 results	Jul 15, 2020	Dec 12, 2023
Xylenes, Total 2955	Organic Chemical	2 of 30 results	Jan 28, 2004	Sep 1, 2011
Cyanide 1024	Inorganic Chemical	1 of 21 results	Feb 8, 2021	Feb 8, 2021
Dichloroacetic Acid 2451	Organic Chemical	1 of 15 results	Jul 12, 2011	Jul 12, 2011

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

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The most recent samples, result by result

The table below lists 11–18 of 18 samples, newest first — collected October 22, 2024 to April 9, 2025. The summary above covers all 18.

22 results from the 8 samples listed here: 15 detected, 7 not detected. 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.

Chemical and radiological sample results for Atlanta Water System, Inc., every result from 11 to 18 of 18 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 Apr 9, 2025 13:52 Sampling point SM1 Location withheld Sample type Routine Lab sample HA-250410-016 Laboratory MSDH Lab
3.84 ug/l , sample collected Apr 9, 2025 13:52, sampling point SM1	Total Haloacetic Acids (Haa5) 2456 EPA method 552.2	Jan 1, 2025 – Dec 31, 2025
Collected Apr 9, 2025 14:11 Sampling point SM1 Location withheld Sample type Routine Lab sample TH-250410-016 Laboratory MSDH Lab
1.03 ug/l , sample collected Apr 9, 2025 14:11, sampling point SM1	TTHM 2950 EPA method 524.2	Jan 1, 2025 – Dec 31, 2025
Collected Feb 10, 2025 14:30 Sampling point TF103 Treatmnt Plant T103 Sample type Routine Lab sample NI-250211-017 Laboratory MSDH Lab
0.369 mg/l , sample collected Feb 10, 2025 14:30, sampling point TF103	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
0.302 mg/l , sample collected Feb 10, 2025 14:30, sampling point TF103	Nitrate 1040 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
0.0674 mg/l , sample collected Feb 10, 2025 14:30, sampling point TF103	Nitrite 1041 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Collected Feb 10, 2025 14:00 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NI-250211-016 Laboratory MSDH Lab
0.369 mg/l , sample collected Feb 10, 2025 14:00, sampling point TF101	Nitrate-Nitrite 1038 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
0.302 mg/l , sample collected Feb 10, 2025 14:00, sampling point TF101	Nitrate 1040 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
0.0669 mg/l , sample collected Feb 10, 2025 14:00, sampling point TF101	Nitrite 1041 EPA method QC10107041C	Jan 1, 2025 – Dec 31, 2025
Collected Jan 14, 2025 12:05 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample IN-250115-006 Laboratory MSDH Lab
0.0054 mg/l , sample collected Jan 14, 2025 12:05, sampling point TF101	Arsenic 1005 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.137 mg/l , sample collected Jan 14, 2025 12:05, 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 Jan 14, 2025 12:05, sampling point TF101	Cadmium 1015 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.0021 mg/l , sample collected Jan 14, 2025 12:05, sampling point TF101	Chromium 1020 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
0.247 mg/l , sample collected Jan 14, 2025 12:05, sampling point TF101	Fluoride 1025 EPA method QC 10-109-12-2-A	Jan 1, 2023 – Dec 31, 2025
Not detected below 0.2 ug/l Minimum Reporting Level , sample collected Jan 14, 2025 12:05, sampling point TF101	Mercury 1035 EPA method 245.1	Jan 1, 2023 – Dec 31, 2025
0.0024 mg/l , sample collected Jan 14, 2025 12:05, sampling point TF101	Nickel 1036 EPA method 200.8	Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Jan 14, 2025 12:05, 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 Jan 14, 2025 12:05, 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 Jan 14, 2025 12:05, 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 Jan 14, 2025 12:05, sampling point TF101	Thallium, Total 1085 EPA method 200.8	Jan 1, 2023 – Dec 31, 2025
Collected Oct 28, 2024 12:35 Sampling point TF103 Treatmnt Plant T103 Sample type Routine Lab sample CN-241029-014 Laboratory MSDH Lab
Not detected below 0.015 mg/l Minimum Reporting Level , sample collected Oct 28, 2024 12:35, sampling point TF103	Cyanide 1024 EPA method QC10204001X	Jan 1, 2022 – Dec 31, 2024
Collected Oct 22, 2024 12:50 Sampling point TF103 Treatmnt Plant T103 Sample type Routine Lab sample NA-241023-018 Laboratory MSDH Lab
181 mg/l , sample collected Oct 22, 2024 12:50, sampling point TF103	Sodium 1052 EPA method 200.7	Jan 1, 2022 – Dec 31, 2024
Collected Oct 22, 2024 12:15 Sampling point TF101 Treatment Plant T101 Sample type Routine Lab sample NA-241023-017 Laboratory MSDH Lab
168 mg/l , sample collected Oct 22, 2024 12:15, sampling point TF101	Sodium 1052 EPA method 200.7	Jan 1, 2022 – Dec 31, 2024

Collected
Apr 9, 2025 13:52

Sampling point
SM1 Location withheld

Sample type
Routine

Lab sample
HA-250410-016

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Total Haloacetic Acids (Haa5) 2456 EPA method 552.2
  
  Result
  3.84 ug/l
Collected
Apr 9, 2025 14:11

Sampling point
SM1 Location withheld

Sample type
Routine

Lab sample
TH-250410-016

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- TTHM 2950 EPA method 524.2
  
  Result
  1.03 ug/l
Collected
Feb 10, 2025 14:30

Sampling point
TF103 Treatmnt Plant T103

Sample type
Routine

Lab sample
NI-250211-017

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  0.369 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  0.302 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  0.0674 mg/l
Collected
Feb 10, 2025 14:00

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NI-250211-016

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2025 – Dec 31, 2025
- Nitrate-Nitrite 1038 EPA method QC10107041C
  
  Result
  0.369 mg/l
- Nitrate 1040 EPA method QC10107041C
  
  Result
  0.302 mg/l
- Nitrite 1041 EPA method QC10107041C
  
  Result
  0.0669 mg/l
Collected
Jan 14, 2025 12:05

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
IN-250115-006

Laboratory
MSDH Lab
- Arsenic 1005 EPA method 200.8
  
  Result
  0.0054 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Barium 1010 EPA method 200.8
  
  Result
  0.137 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Cadmium 1015 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Chromium 1020 EPA method 200.8
  
  Result
  0.0021 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Fluoride 1025 EPA method QC 10-109-12-2-A
  
  Result
  0.247 mg/l
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Mercury 1035 EPA method 245.1
  
  Result
  Not detected below 0.2 ug/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Nickel 1036 EPA method 200.8
  
  Result
  0.0024 mg/l
  
  Monitoring period
  Not recorded
- Selenium 1045 EPA method 200.8
  
  Result
  Not detected below 0.0025 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Antimony, Total 1074 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Beryllium, Total 1075 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
- Thallium, Total 1085 EPA method 200.8
  
  Result
  Not detected below 0.0005 mg/l Minimum Reporting Level
  
  Monitoring period
  Jan 1, 2023 – Dec 31, 2025
Collected
Oct 28, 2024 12:35

Sampling point
TF103 Treatmnt Plant T103

Sample type
Routine

Lab sample
CN-241029-014

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2024
- Cyanide 1024 EPA method QC10204001X
  
  Result
  Not detected below 0.015 mg/l Minimum Reporting Level
Collected
Oct 22, 2024 12:50

Sampling point
TF103 Treatmnt Plant T103

Sample type
Routine

Lab sample
NA-241023-018

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2024
- Sodium 1052 EPA method 200.7
  
  Result
  181 mg/l
Collected
Oct 22, 2024 12:15

Sampling point
TF101 Treatment Plant T101

Sample type
Routine

Lab sample
NA-241023-017

Laboratory
MSDH Lab

Monitoring period
Jan 1, 2022 – Dec 31, 2024
- Sodium 1052 EPA method 200.7
  
  Result
  168 mg/l

Routine (8).