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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

MS0600007 , City of Marks

38 of the 72 analytes this system has been tested for have been detected at least once, across 258 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 258 samples on record, detections range from October 20, 2003 to July 2, 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 City of Marks, 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 168 of 168 results Aug 7, 2007 Jul 2, 2025
Lead 1030 Inorganic Chemical 94 of 169 results Aug 7, 2007 Jul 2, 2025
Barium 1010 Inorganic Chemical 10 of 10 results Oct 20, 2003 Apr 14, 2025
Fluoride 1025 Inorganic Chemical 10 of 12 results Oct 20, 2003 Apr 14, 2025
Nitrate-Nitrite 1038 Inorganic Chemical 9 of 21 results Jun 7, 2004 Mar 21, 2012
Nitrate 1040 Inorganic Chemical 9 of 21 results Jun 7, 2004 Mar 21, 2012
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 7 of 18 results Sep 4, 2007 Aug 23, 2023
TTHM 2950 Organic Chemical 7 of 18 results Sep 4, 2007 Aug 23, 2023
Chromium 1020 Inorganic Chemical 6 of 10 results Apr 11, 2005 Apr 14, 2025
Gross Alpha, Incl. Radon & U 4002 Radionuclide 5 of 5 results Dec 12, 2011 Jul 19, 2012
Sodium 1052 Inorganic Chemical 4 of 4 results May 20, 2010 Dec 13, 2023
Nickel 1036 Inorganic Chemical 3 of 10 results Apr 11, 2005 Apr 14, 2025
Sulfate 1055 Inorganic Chemical 3 of 3 results Oct 20, 2003 May 20, 2010
Dichloroacetic Acid 2451 Organic Chemical 2 of 12 results Sep 6, 2013 Dec 7, 2016
Chloroform 2941 Organic Chemical 2 of 13 results Sep 5, 2013 Dec 7, 2016
Calcium 1016 Inorganic Chemical 2 of 2 results May 20, 2010 May 20, 2010
Chloride 1017 Inorganic Chemical 2 of 2 results May 20, 2010 May 20, 2010
Iron 1028 Inorganic Chemical 2 of 2 results May 20, 2010 May 20, 2010
Magnesium 1031 Inorganic Chemical 2 of 2 results May 20, 2010 May 20, 2010
Residue, Total, Filterable 1057 Water Quality 2 of 2 results May 20, 2010 May 20, 2010
Carbon Dioxide 1901 Water Quality 2 of 2 results May 20, 2010 May 20, 2010
Hardness, Total (As Caco3) 1915 Water Quality 2 of 2 results May 20, 2010 May 20, 2010
Alkalinity, Total 1927 Water Quality 2 of 2 results May 20, 2010 May 20, 2010
Calculated Sodium NACA Water Quality 2 of 2 results May 20, 2010 May 20, 2010
PH, Field Result PHFD Water Quality 2 of 2 results May 20, 2010 May 20, 2010
Nitrite 1041 Inorganic Chemical 1 of 21 results Oct 13, 2021 Oct 13, 2021
Monochloroacetic Acid 2450 Organic Chemical 1 of 12 results Sep 6, 2013 Sep 6, 2013
Trichloroacetic Acid 2452 Organic Chemical 1 of 12 results Sep 6, 2013 Sep 6, 2013
Monobromoacetic Acid 2453 Organic Chemical 1 of 12 results Sep 6, 2013 Sep 6, 2013
Bromodichloromethane 2943 Organic Chemical 1 of 13 results Sep 5, 2013 Sep 5, 2013
Manganese 1032 Inorganic Chemical 1 of 1 result May 20, 2010 May 20, 2010
Potassium 1042 Inorganic Chemical 1 of 1 result May 20, 2010 May 20, 2010
Alkalinity, Caco3 Stability 1067 Water Quality 1 of 1 result May 20, 2010 May 20, 2010
Color 1905 Water Quality 1 of 1 result May 20, 2010 May 20, 2010
Iron, Field Result FEFD Inorganic Chemical 1 of 1 result May 20, 2010 May 20, 2010
Cadmium 1015 Inorganic Chemical 1 of 10 results Apr 11, 2005 Apr 11, 2005
Selenium 1045 Inorganic Chemical 1 of 10 results Apr 11, 2005 Apr 11, 2005
Dichloromethane 2964 Organic Chemical 1 of 7 results Aug 23, 2004 Aug 23, 2004

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 221–230 of 258 samples, newest first — collected August 9, 2007 to May 20, 2010. The summary above covers all 258.

48 results from the 10 samples listed here: 30 detected, 18 not detected. Across the whole record it is 372 of 874. 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 City of Marks, every result from 221 to 230 of 258 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 20, 2010
Sampling point
WL005 Well W005
Sample type
Routine
Lab sample
100521-001PC
Laboratory
MSDH Lab
1.15 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Calcium 1016 EPA method 200.8 Not recorded
1.75 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Chloride 1017 EPA method 300.0 Not recorded
0.09 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Fluoride 1025 EPA method 380-75WE Not recorded
0.765 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Iron 1028 EPA method 200.8 Not recorded
0.497 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Magnesium 1031 EPA method 200.8 Not recorded
0.032 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Manganese 1032 EPA method 200.8 Not recorded
1.68 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Potassium 1042 EPA method 200.8 Not recorded
41.6 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Sodium 1052 EPA method 200.8 Not recorded
4.47 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Sulfate 1055 EPA method 300.0 Not recorded
112 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Residue, Total, Filterable 1057 EPA method CALCUL LAB Not recorded
0 mg/l This result is recorded as a detection, and the figure the agency wrote — "0" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. , sample collected May 20, 2010, sampling point WL005 Alkalinity, Caco3 Stability 1067 EPA method 2320B Not recorded
55 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Carbon Dioxide 1901 EPA method CALCUL LAB Not recorded
5.1 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Hardness, Total (As Caco3) 1915 EPA method CALCUL LAB Not recorded
99.9 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Alkalinity, Total 1927 EPA method 2320B Not recorded
1 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Iron, Field Result FEFD EPA method 3500AL-D Not recorded
45.6 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 Calculated Sodium NACA EPA method CALCUL LAB Not recorded
6.6 ph The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected May 20, 2010, sampling point WL005 PH, Field Result PHFD EPA method 3500AL-D Not recorded
Collected
Mar 3, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100304-007CN
Laboratory
MSDH Lab
Not detected below 15 ug/l Minimum Reporting Level , sample collected Mar 3, 2010, sampling point TF080 Cyanide 1024 EPA method QC10204001X Jan 1, 2008 – Dec 31, 2010
Collected
Feb 3, 2010
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
100204-070IN
Laboratory
MSDH Lab
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Arsenic 1005 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.027723 mg/l , sample collected Feb 3, 2010, sampling point TF080 Barium 1010 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Cadmium 1015 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Chromium 1020 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.1 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Fluoride 1025 EPA method 380-75WE Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Mercury 1035 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Nickel 1036 EPA method 200.8 Not recorded
Not detected below 0.0025 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Selenium 1045 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Antimony, Total 1074 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Beryllium, Total 1075 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Feb 3, 2010, sampling point TF080 Thallium, Total 1085 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
May 20, 2009
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
090521-028NI
Laboratory
MSDH Lab
0.33 mg/l , sample collected May 20, 2009, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
0.33 mg/l , sample collected May 20, 2009, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Not detected below 0.05 mg/l Minimum Reporting Level , sample collected May 20, 2009, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2009 – Dec 31, 2009
Collected
Jul 14, 2008
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
080715-004NI
Laboratory
MSDH Lab
0.27 mg/l , sample collected Jul 14, 2008, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
0.27 mg/l , sample collected Jul 14, 2008, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Jul 14, 2008, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2008 – Dec 31, 2008
Collected
Nov 27, 2007
Sampling point
TF080 Treatment Plant T080
Sample type
Routine
Lab sample
071128-059NI
Laboratory
MSDH Lab
0.26 mg/l , sample collected Nov 27, 2007, sampling point TF080 Nitrate-Nitrite 1038 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
0.26 mg/l , sample collected Nov 27, 2007, sampling point TF080 Nitrate 1040 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Not detected below 0.02 mg/l Minimum Reporting Level , sample collected Nov 27, 2007, sampling point TF080 Nitrite 1041 EPA method 353.2 Jan 1, 2007 – Dec 31, 2007
Collected
Sep 4, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070905-015HA
Laboratory
MSDH Lab
0.0004 mg/l The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 4, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2005 – Dec 31, 2007
Collected
Sep 4, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070905-015TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Sep 4, 2007, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
0 This result is recorded as a detection, and the figure the agency wrote — "0.00" — is zero to the precision it was written to. Read the zero as "smaller than the written figure resolves", not as "none present". SDWIS holds a separate numeric concentration that Drinking Water Watch does not publish, so this endpoint does not carry it either; no more precise magnitude is available here. The agency recorded a value but no unit of measure for it. The unit is NOT inferable from the analyte: many analytes are reported in more than one unit — TTHM and HAA5 in both MG/L and UG/L — so there is no per-analyte default to fall back on. The number is published as it stands and must not be compared to a limit. The agency recorded which kind of limit this result was below, but stored 0.000000000 as the limit itself, which is not a level. The type is published and the value is null. What the limit was is not on record. Whether the result was a detection is a separate column: read resultType. , sample collected Sep 4, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2005 – Dec 31, 2007
Collected
Aug 9, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070810-264PB
Laboratory
MSDH Lab
0.5319 mg/l , sample collected Aug 9, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0072 mg/l , sample collected Aug 9, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
Collected
Aug 9, 2007
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
070810-247PB
Laboratory
MSDH Lab
0.2014 mg/l , sample collected Aug 9, 2007, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008
0.0027 mg/l , sample collected Aug 9, 2007, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2006 – Dec 31, 2008

Routine (10).