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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

MS0630002 , Town of Cary

38 of the 72 analytes this system has been tested for have been detected at least once, across 252 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 252 samples on record, detections range from October 22, 2003 to October 15, 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 Town of Cary, 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
TTHM 2950 Organic Chemical 52 of 52 results Sep 21, 2004 Oct 15, 2025
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 50 of 51 results Sep 21, 2004 Oct 15, 2025
Chloroform 2941 Organic Chemical 29 of 29 results Aug 17, 2006 Mar 19, 2024
Copper, Free 1022 Inorganic Chemical 26 of 26 results Jul 10, 2007 Aug 26, 2020
Lead 1030 Inorganic Chemical 24 of 26 results Jul 10, 2007 Aug 26, 2020
Dichloroacetic Acid 2451 Organic Chemical 23 of 23 results Feb 26, 2008 Mar 19, 2024
Bromodichloromethane 2943 Organic Chemical 23 of 29 results Aug 17, 2006 Mar 19, 2024
Trichloroacetic Acid 2452 Organic Chemical 22 of 23 results Feb 26, 2008 Mar 19, 2024
Fluoride 1025 Inorganic Chemical 18 of 18 results Oct 22, 2003 Jul 29, 2025
Barium 1010 Inorganic Chemical 15 of 15 results Oct 22, 2003 Jul 29, 2025
Nitrite 1041 Inorganic Chemical 13 of 34 results Aug 2, 2006 Mar 29, 2022
Chromium 1020 Inorganic Chemical 10 of 15 results Oct 22, 2003 Jul 29, 2025
Dibromochloromethane 2944 Organic Chemical 10 of 29 results Dec 4, 2006 Mar 19, 2024
Gross Alpha, Incl. Radon & U 4002 Radionuclide 10 of 10 results Dec 14, 2011 Jul 18, 2012
Xylenes, Total 2955 Organic Chemical 9 of 32 results Jun 5, 2012 Mar 17, 2015
Sodium 1052 Inorganic Chemical 8 of 8 results Apr 21, 2010 Nov 7, 2023
Nickel 1036 Inorganic Chemical 7 of 15 results Apr 20, 2005 Sep 4, 2018
Monochloroacetic Acid 2450 Organic Chemical 5 of 23 results Feb 26, 2008 Mar 19, 2024
Calcium 1016 Inorganic Chemical 4 of 4 results Apr 21, 2010 Apr 14, 2015
Chloride 1017 Inorganic Chemical 4 of 4 results Apr 21, 2010 Apr 14, 2015
Manganese 1032 Inorganic Chemical 4 of 4 results Apr 21, 2010 Apr 14, 2015
Potassium 1042 Inorganic Chemical 4 of 4 results Apr 21, 2010 Apr 14, 2015
Sulfate 1055 Inorganic Chemical 4 of 5 results Apr 21, 2010 Apr 14, 2015
Residue, Total, Filterable 1057 Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Alkalinity, Caco3 Stability 1067 Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Color 1905 Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Hardness, Total (As Caco3) 1915 Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Alkalinity, Total 1927 Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Calculated Sodium NACA Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
PH, Field Result PHFD Water Quality 4 of 4 results Apr 21, 2010 Apr 14, 2015
Ethylbenzene 2992 Organic Chemical 4 of 32 results Jun 5, 2012 Nov 4, 2013
Selenium 1045 Inorganic Chemical 3 of 15 results Mar 24, 2004 Apr 16, 2008
Arsenic 1005 Inorganic Chemical 2 of 15 results Sep 4, 2018 Jul 29, 2025
Iron, Field Result FEFD Inorganic Chemical 2 of 4 results Apr 21, 2010 Apr 14, 2015
Carbon Dioxide 1901 Water Quality 2 of 2 results Apr 21, 2010 Apr 21, 2010
Styrene 2996 Organic Chemical 1 of 32 results Jun 5, 2012 Jun 5, 2012
Monobromoacetic Acid 2453 Organic Chemical 1 of 23 results Dec 6, 2011 Dec 6, 2011
Magnesium 1031 Inorganic Chemical 1 of 4 results Apr 21, 2010 Apr 21, 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 161–170 of 252 samples, newest first — collected February 28, 2011 to May 16, 2011. The summary above covers all 252.

68 results from the 10 samples listed here: 16 detected, 52 not detected. Across the whole record it is 418 of 1,465. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Chemical and radiological sample results for Town of Cary, every result from 161 to 170 of 252 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
May 16, 2011
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110517-020HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.015 mg/l , sample collected May 16, 2011, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.016 mg/l , sample collected May 16, 2011, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected May 16, 2011, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.031 mg/l , sample collected May 16, 2011, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Apr 1, 2011 – Jun 30, 2011
Collected
May 16, 2011
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110517-020TH
Laboratory
MSDH Lab
40.2 ug/l , sample collected May 16, 2011, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 16, 2011, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
4.02 ug/l , sample collected May 16, 2011, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected May 16, 2011, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
44.2 ug/l , sample collected May 16, 2011, sampling point MRT000 TTHM 2950 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Collected
May 11, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110512-007CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected May 11, 2011, sampling point TF102 Cyanide 1024 EPA method QC10204001X Jan 1, 2010 – Dec 31, 2012
Collected
May 11, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110512-006CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected May 11, 2011, sampling point TF101 Cyanide 1024 EPA method QC10204001X Jan 1, 2010 – Dec 31, 2012
Collected
May 2, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110503-020IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Arsenic 1005 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.003698 mg/l , sample collected May 2, 2011, sampling point TF102 Barium 1010 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Cadmium 1015 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.00052 mg/l , sample collected May 2, 2011, sampling point TF102 Chromium 1020 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.515 mg/l , sample collected May 2, 2011, sampling point TF102 Fluoride 1025 EPA method 380-75WE Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Mercury 1035 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Selenium 1045 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Antimony, Total 1074 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF102 Thallium, Total 1085 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
May 2, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110503-019IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Arsenic 1005 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.003691 mg/l , sample collected May 2, 2011, sampling point TF101 Barium 1010 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Cadmium 1015 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.006027 mg/l , sample collected May 2, 2011, sampling point TF101 Chromium 1020 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
0.518 mg/l , sample collected May 2, 2011, sampling point TF101 Fluoride 1025 EPA method 380-75WE Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Mercury 1035 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Selenium 1045 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Antimony, Total 1074 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected May 2, 2011, sampling point TF101 Thallium, Total 1085 EPA method 200.8 Jan 1, 2010 – Dec 31, 2012
Collected
Apr 20, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110421-012VO
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,2,4-Trichlorobenzene 2378 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Cis-1,2-Dichloroethylene 2380 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Xylenes, Total 2955 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Dichloromethane 2964 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 O-Dichlorobenzene 2968 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 P-Dichlorobenzene 2969 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Vinyl Chloride 2976 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,1-Dichloroethylene 2977 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Trans-1,2-Dichloroethylene 2979 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,2-Dichloroethane 2980 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,1,1-Trichloroethane 2981 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Carbon Tetrachloride 2982 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,2-Dichloropropane 2983 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Trichloroethylene 2984 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 1,1,2-Trichloroethane 2985 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Tetrachloroethylene 2987 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Chlorobenzene 2989 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Benzene 2990 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Toluene 2991 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Ethylbenzene 2992 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Not detected below 0.0005 mg/l Method Detection Limit , sample collected Apr 20, 2011, sampling point TF101 Styrene 2996 EPA method 524.2 Apr 1, 2011 – Jun 30, 2011
Collected
Mar 28, 2011
Sampling point
TF101 Treatment Plant T101
Sample type
Routine
Lab sample
110329-104NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF101 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF101 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF101 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Mar 28, 2011
Sampling point
TF102
Sample type
Routine
Lab sample
110329-089NI
Laboratory
MSDH Lab
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF102 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.08 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF102 Nitrate 1040 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Mar 28, 2011, sampling point TF102 Nitrite 1041 EPA method 353.2 Jan 1, 2011 – Dec 31, 2011
Collected
Feb 28, 2011
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
110301-006HA
Laboratory
MSDH Lab
0.004 mg/l , sample collected Feb 28, 2011, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.046 mg/l , sample collected Feb 28, 2011, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
0.062 mg/l , sample collected Feb 28, 2011, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 28, 2011, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Feb 28, 2011, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0.11 mg/l , sample collected Feb 28, 2011, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2011 – Mar 31, 2011

Routine (10).