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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

MS0180022 , S MS Public Water Auth-Rock Hill

19 of the 56 analytes this system has been tested for have been detected at least once, across 281 samples on record.

The other 37 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 281 samples on record, detections range from May 19, 2004 to August 4, 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 S MS Public Water Auth-Rock Hill, 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 113 of 113 results Jun 26, 2007 Aug 13, 2024
Lead 1030 Inorganic Chemical 69 of 113 results Jun 26, 2007 Aug 13, 2024
TTHM 2950 Organic Chemical 44 of 45 results May 19, 2004 Aug 4, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 42 of 47 results May 19, 2004 Aug 6, 2024
Chloroform 2941 Organic Chemical 36 of 37 results Sep 12, 2006 Aug 4, 2025
Bromodichloromethane 2943 Organic Chemical 33 of 37 results Sep 12, 2006 Aug 4, 2025
Dichloroacetic Acid 2451 Organic Chemical 30 of 34 results Jan 29, 2008 Aug 6, 2024
Trichloroacetic Acid 2452 Organic Chemical 30 of 34 results Jan 29, 2008 Aug 6, 2024
Xylenes, Total 2955 Organic Chemical 13 of 30 results Jul 14, 2004 Jul 13, 2009
Barium 1010 Inorganic Chemical 10 of 10 results Nov 15, 2004 Feb 4, 2025
Fluoride 1025 Inorganic Chemical 9 of 10 results Nov 15, 2004 Feb 4, 2025
Monochloroacetic Acid 2450 Organic Chemical 8 of 34 results Apr 29, 2008 Jun 26, 2018
Dibromochloromethane 2944 Organic Chemical 7 of 37 results Apr 29, 2008 Aug 4, 2025
Chromium 1020 Inorganic Chemical 5 of 10 results Mar 2, 2005 Jan 26, 2021
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 10, 2012
Ethylbenzene 2992 Organic Chemical 4 of 30 results Jul 14, 2004 May 12, 2008
Sodium 1052 Inorganic Chemical 3 of 3 results Sep 23, 2019 Jan 30, 2024
Nickel 1036 Inorganic Chemical 2 of 10 results Apr 2, 2008 Apr 16, 2014
Selenium 1045 Inorganic Chemical 2 of 10 results Mar 2, 2005 Feb 6, 2006

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 31–40 of 281 samples, newest first — collected July 27, 2021 to December 18, 2023. The summary above covers all 281.

36 results from the 10 samples listed here: 14 detected, 22 not detected. Across the whole record it is 465 of 1,480. 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 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 S MS Public Water Auth-Rock Hill, every result from 31 to 40 of 281 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
Dec 18, 2023 10:30
Sampling point
SM4 Location withheld
Sample type
Routine
Lab sample
810-88314-1
Laboratory
Eurofins Eaton Analytical South Bend in
Not detected below 2 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
1.6 ug/l , sample collected Dec 18, 2023 10:30, sampling point SM4 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
2 ug/l , sample collected Dec 18, 2023 10:30, sampling point SM4 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
3.6 ug/l , sample collected Dec 18, 2023 10:30, sampling point SM4 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Oct 1, 2023 – Dec 31, 2023
1.4 ug/l , sample collected Dec 18, 2023 10:30, sampling point SM4 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 0.5 ug/l Minimum Reporting Level , sample collected Dec 18, 2023 10:30, sampling point SM4 Dibromochloromethane 2944 EPA method 524.2 Not recorded
1.4 ug/l , sample collected Dec 18, 2023 10:30, sampling point SM4 TTHM 2950 EPA method 524.2 Oct 1, 2023 – Dec 31, 2023
Collected
Apr 25, 2023 12:30
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
HA-230426-021
Laboratory
MSDH Lab
7.96 ug/l , sample collected Apr 25, 2023 12:30, sampling point SMT Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Apr 25, 2023 12:15
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
HA-230426-020
Laboratory
MSDH Lab
7.48 ug/l , sample collected Apr 25, 2023 12:15, sampling point SMH Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2023 – Dec 31, 2023
Collected
Apr 25, 2023 12:30
Sampling point
SMT Location withheld
Sample type
Routine
Lab sample
TH-230426-021
Laboratory
MSDH Lab
13.4 ug/l , sample collected Apr 25, 2023 12:30, sampling point SMT TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Apr 25, 2023 12:15
Sampling point
SMH Location withheld
Sample type
Routine
Lab sample
TH-230426-020
Laboratory
MSDH Lab
13.2 ug/l , sample collected Apr 25, 2023 12:15, sampling point SMH TTHM 2950 EPA method 524.2 Jan 1, 2023 – Dec 31, 2023
Collected
Jan 24, 2023 13:10
Sampling point
TF101
Sample type
Routine
Lab sample
NI-230125-007
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 24, 2023 13:10, sampling point TF101 Nitrate-Nitrite 1038 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Jan 24, 2023 13:10, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 24, 2023 13:10, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2023 – Dec 31, 2023
Collected
May 9, 2022 11:42
Sampling point
TF101
Sample type
Routine
Lab sample
IN-220510-056
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.0027 mg/l , sample collected May 9, 2022 11:42, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
0.587 mg/l , sample collected May 9, 2022 11:42, sampling point TF101 Fluoride 1025 EPA method QC 10-109-12-2-A Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 9, 2022 11:42, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2020 – Dec 31, 2022
Collected
Jan 25, 2022 12:35
Sampling point
TF101
Sample type
Routine
Lab sample
NI-220126-004
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Jan 25, 2022 12:35, sampling point TF101 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 25, 2022 12:35, sampling point TF101 Nitrate 1040 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jan 25, 2022 12:35, sampling point TF101 Nitrite 1041 EPA method QC10107041C Jan 1, 2022 – Dec 31, 2022
Collected
Jul 27, 2021 07:00
Sampling point
LC0009 Location withheld
Sample type
Routine
Lab sample
PB-210728-032
Laboratory
MSDH Lab
0.263 mg/l , sample collected Jul 27, 2021 07:00, sampling point LC0009 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 27, 2021 07:00, sampling point LC0009 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
Collected
Jul 27, 2021 07:15
Sampling point
LC0010 Location withheld
Sample type
Routine
Lab sample
PB-210728-031
Laboratory
MSDH Lab
0.00564 mg/l , sample collected Jul 27, 2021 07:15, sampling point LC0010 Copper, Free 1022 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021
0.5 ug/l , sample collected Jul 27, 2021 07:15, sampling point LC0010 Lead 1030 EPA method 200.8 Jan 1, 2019 – Dec 31, 2021

Routine (10).