Skip to main content
Alpha

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

MS0260003 , Castalian W/A

10 of the 51 analytes this system has been tested for have been detected at least once, across 113 samples on record.

The other 41 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 113 samples on record, detections range from August 17, 1993 to September 10, 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 Castalian W/A, 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 66 of 84 results Aug 17, 1993 Sep 10, 2025
Lead 1030 Inorganic Chemical 36 of 84 results Aug 17, 1993 Sep 10, 2025
TTHM 2950 Organic Chemical 6 of 9 results Jun 4, 2007 Oct 17, 2022
Total Haloacetic Acids (Haa5) 2456 Organic Chemical 4 of 9 results Jun 4, 2007 Oct 17, 2022
Chloroform 2941 Organic Chemical 3 of 6 results Jul 1, 2009 Aug 17, 2017
Dichloroacetic Acid 2451 Organic Chemical 2 of 5 results Jul 1, 2009 Jun 28, 2011
Barium 1010 Inorganic Chemical 2 of 2 results Sep 17, 2003 Feb 9, 2004
Sulfate 1055 Inorganic Chemical 2 of 2 results Sep 17, 2003 Feb 9, 2004
Monobromoacetic Acid 2453 Organic Chemical 1 of 5 results Jul 1, 2009 Jul 1, 2009
Fluoride 1025 Inorganic Chemical 1 of 2 results Sep 17, 2003 Sep 17, 2003

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 51–60 of 113 samples, newest first — collected September 27, 2004 to June 22, 2010. The summary above covers all 113.

36 results from the 10 samples listed here: 15 detected, 21 not detected. Across the whole record it is 123 of 350. A sample is analysed for many analytes at once, so one sample appears on as many rows as it had results.

Units in this table

TTHM is recorded on this page in ug/l and mg/l. 1 mg/l = 1,000 ug/l.

Chemical and radiological sample results for Castalian W/A, every result from 51 to 60 of 113 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
Jun 22, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100624-003PB
Laboratory
MSDH Lab
0.3917 mg/l , sample collected Jun 22, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0009 mg/l , sample collected Jun 22, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jun 22, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100624-002PB
Laboratory
MSDH Lab
0.4934 mg/l , sample collected Jun 22, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0009 mg/l , sample collected Jun 22, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jun 22, 2010
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
100624-001PB
Laboratory
MSDH Lab
0.3486 mg/l , sample collected Jun 22, 2010, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
0.0008 mg/l , sample collected Jun 22, 2010, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2008 – Dec 31, 2010
Collected
Jul 1, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
090702-010HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Jul 1, 2009, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
0.001 mg/l , sample collected Jul 1, 2009, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
0 mg/l 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. , sample collected Jul 1, 2009, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2009 – Dec 31, 2009
Collected
Jul 1, 2009
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
090702-010TH
Laboratory
MSDH Lab
2.56 ug/l , sample collected Jul 1, 2009, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jul 1, 2009, sampling point MRT000 Dibromochloromethane 2944 EPA method 524.2 Not recorded
2.56 ug/l , sample collected Jul 1, 2009, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2009 – Dec 31, 2009
Collected
Jun 24, 2008
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
080625-008HA
Laboratory
MSDH Lab
Not detected below 0.002 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Monochloroacetic Acid 2450 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Dichloroacetic Acid 2451 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Trichloroacetic Acid 2452 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Monobromoacetic Acid 2453 EPA method 552.2 Not recorded
Not detected below 0.001 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Dibromoacetic Acid 2454 EPA method 552.2 Not recorded
Not detected below 0.006 mg/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 Jan 1, 2008 – Dec 31, 2008
Collected
Jun 24, 2008
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
080625-008TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2008, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 24, 2008, 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 Jun 24, 2008, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2008 – Dec 31, 2008
Collected
Jun 4, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070605-010TH
Laboratory
MSDH Lab
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2007, sampling point MRT000 Chloroform 2941 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2007, sampling point MRT000 Bromoform 2942 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 4, 2007, sampling point MRT000 Bromodichloromethane 2943 EPA method 524.2 Not recorded
Not detected below 1 ug/l Minimum Reporting Level , sample collected Jun 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 Jun 4, 2007, sampling point MRT000 TTHM 2950 EPA method 524.2 Jan 1, 2007 – Dec 31, 2007
Collected
Jun 4, 2007
Sampling point
MRT000 Max. Res. Time
Sample type
Routine
Lab sample
070605-001HA
Laboratory
MSDH Lab
0.0048 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 Jun 4, 2007, sampling point MRT000 Total Haloacetic Acids (Haa5) 2456 EPA method 552.2 Jan 1, 2007 – Dec 31, 2007
Collected
Sep 27, 2004
Sampling point
DS000 Distribution
Sample type
Routine
Lab sample
040928-029PB
Laboratory
MSDH Lab
0.034 mg/l , sample collected Sep 27, 2004, sampling point DS000 Copper, Free 1022 EPA method 200.8 Jan 1, 2003 – Dec 31, 2005
Not detected below 0.0005 mg/l Minimum Reporting Level , sample collected Sep 27, 2004, sampling point DS000 Lead 1030 EPA method 200.8 Jan 1, 2003 – Dec 31, 2005

Routine (10).