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Regional Stormwater Monitoring Program - Sampling Updates

Each Quarter of the Monitoring Term, there is a summary of storm event data. It is presented below with newer data on top. For 2013 Data, click here and 2012 Data - Click here.

2014 Data

First Quarter Update (This set of station data has not yet been posted to this website.)

January 10, 2014 Storm Event

On Friday, January 10th, an area of low pressure brought moisture and light rain to the region. Storm tracking activities were initiated on Thursday and it wasn’t until Friday morning that enough rainfall accumulated to produce flow at a few of the monitoring locations. Many areas did not receive enough rainfall to produce flow. Atkin’s monitoring teams mobilized to the field and were able to collect 6 samples. The following is a summary for each watershed:

  • Arlington – Insufficient rainfall was received in this area.
  • Garland – GA 1401 was successfully sampled. GA 1402 and GA 1403 were triggered prior to the event and were unable to be reset in time. The sites were reset and are ready for the next eligible event.
  • Irving – Insufficient rainfall was received in this area..
  • Mesquite – MS 1402 was successfully sampled. Insufficient rainfall was received on the watershed for MS 1401.
  • Plano – Insufficient rainfall was received in this area.
  • NTTA – All sites were successfully sampled.
  • TxDOT – All sites were successfully sampled.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

February 2, 2014 Storm Event

On Sunday, February 2nd (Super Bowl Sunday) a winter storm brought light rain to the DFW Metroplex and snowfall and ice northwest of the Metroplex.  Storm tracking activities were initiated on Sunday morning but it wasn’t until evening that enough rainfall accumulated to produce flow at the remaining monitoring locations.    

Monitoring teams mobilized to the field and were able to collect 7 samples.  The following is a summary for each watershed:

  • Arlington – AR 1402 and AR 1403 were successfully sampled.  AR 1401 experienced a tear in the sample tubing during the sampling routine which prevented a full sample from being collected.  The site was reset and is ready for the next event.
  • Garland – GA 1401 was successfully sampled on January 10, 2014.  GA 1402 was triggered three hours after the rain event but the site did not have a modem to notify sampling crews.  GA 1403 was not triggered due to an issue with the bubbler flow module.  The module was troubleshot, the sites were reset and will be ready for the next eligible event.
  • Irving – All sites were successfully sampled.
  • Mesquite – MS 1402 was successfully sampled on January 10, 2014.  MA 1401 was not triggered due to an issue with the bubbler flow module.  The module was troubleshot, the site was reset and will be ready for the next eligible event.
  • Plano – All sites were successfully sampled.
  • NTTA – All sites were successfully sampled on January 10, 2014.
  • TxDOT – All sites were successfully sampled on January 10, 2014. 

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

February 25, 2014 Storm Event

On Tuesday, February 25th, a cool front brought scattered rain to parts of the region.  Storm tracking activities were initiated on Tuesday afternoon and rain fell at the Mesquite and Arlington locations.    

Atkin’s monitoring teams mobilized to the field and were able to collect 2 samples.  The following is a summary for each watershed:

  • Arlington – AR 1401 was successfully sampled.  AR 1402 and AR1403 were successfully sampled on February 2, 2014.
  • Garland – Insufficient rainfall was received in this area.
  • Irving – All sites were successfully sampled on February 2, 2014.
  • Mesquite – MS 1401 was successfully sampled.  MS 1402 was successfully sampled on February 2, 2014.
  • Plano – All sites were successfully sampled on February 2, 2014.
  • NTTA – All sites were successfully sampled on January 10, 2014.
  • TxDOT – All sites were successfully sampled on January 10, 2014. 

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times. 

March 2, 2014 Storm Event

Atkins tracked the storm system on March 2, 2014 for rainfall at the Garland locations.  Insufficient rainfall was received in the area.

March 15, 2014 Storm Event

On Saturday, March 15th, a cool front drove heavy thunderstorms and rain across the region. Storm tracking activities were initiated on Saturday afternoon and rain fell at the remaining Garland locations that afternoon. Atkin’s monitoring teams mobilized to the field and were able to collect 2 samples. The following is a summary for each watershed:

  • Arlington – All sites were successfully sampled on February 2, 2014 and February 25, 2014.
  • Garland – GA 1402 and GA 1403 were successfully sampled. GA 1401 was successfully sampled on January 9, 2014.
  • Irving – All sites were successfully sampled on February 2, 2014.
  • Mesquite – All sites were successfully sampled on February 2, 2014 and February 25, 2014.
  • Plano – All sites were successfully sampled on February 2, 2014.
  • NTTA – All sites were successfully sampled on January 10, 2014.
  • TxDOT – All sites were successfully sampled on January 10, 2014.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

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2013 Data

Fourth Quarter Update

October 5, 2013 Event

On Saturday, a cool front issued in a line of moderate rainfall to the area which was experienced at all sites.  Storm tracking activities were initiated on Saturday morning and it wasn’t until the evening that rainfall and runoff was finally experienced.   

Atkin’s monitoring teams mobilized to the field and were able to collect 15 samples.  The following is a summary for each watershed:

  • Arlington – All sites were successfully sampled.
  • Garland – All sites were successfully sampled.
  • Irving – IR 1301 and IR 1303 were successfully sampled. IR 1302 experienced a malfunction which prevented the proper collection of the first container within the automatic sampler. The site was reset and is ready for the next eligible event.
  • Mesquite – All sites were successfully sampled.
  • Plano – All sites were successfully sampled.
  • NTTA – All sites were successfully sampled.
  • TxDOT – TxDOT 1301 was successfully sampled.  TxDOT 1302 experienced a battery failure.  The battery was replaced and the site reset for the next eligible event. 

ll successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

October 14, 2013 Storm Event

Early on the morning of Monday, October 14th an area of low pressure brought moderate rainfall to the area. Storm tracking activities were initiated early in the morning and samples were collected from the remaining two sites (IR1302 and TxDOT 1302). The samples were taken to the laboratory and met the proper holding times. All samples have been successfully collected for this quarter for all entities.

Third Quarter Update

July 11, 2013 Storm Event

Scattered afternoon thunderstorms formed in the area and brought isolated showers.  Storm tracking activities were initiated in the early afternoon hours and samples were collected in the early evening.   

Atkin’s monitoring teams mobilized to the field and were able to collect 3 samples.  The following is a summary for each watershed:

  • Arlington – No rainfall was observed at the sites.
  • Garland – No rainfall was observed at the sites.
  • Irving – No rainfall was observed at the sites.
  • Mesquite – No rainfall was observed at the sites.
  • Plano – All sites were successfully sampled.
  • NTTA – At NTTA 1301, the automatic sampler was initiated after the peak of the flow event.   NTTA 1301 has been reset and is ready for the next eligible event.  Due to the risk of vandalism at NTTA 1302, the sampler was not deployed.  The rapid formulation of the storm event did not allow for sufficient time to deploy the sampler prior to runoff at the site.  The NTTA 1302 sampler will be deployed prior to the next eligible event.
  • TxDOT – TxDOT 1301 was successfully sampled.  No rainfall was observed at TxDOT 1302.

ll successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

July 14, 2013 Storm Event

On Sunday, an unusual system brought moisture to the area from the north  and all sites experienced some amount of rainfall.  The rain was a slow drizzle in most areas (heavier rain fell on the western sites).  The slow rate combined with dry antecedent conditions led to very little runoff at most of the sites.  Storm tracking activities were initiated on Sunday morning and it wasn’t until midday that eligible amounts began accumulating and runoff was experienced.   

Atkin’s monitoring teams mobilized to the field and were able to collect 6 samples.  The following is a summary for each watershed:

  • Arlington – All sites were successfully sampled.
  • Garland – GA 1301 was successfully sampled.  GA 1302 and GA 1303 experienced minimal runoff.  Due to the qualifying amount of rainfall recorded, an antecedent dry period will be required prior to the next event.
  • Irving – IR 1301 and IR 1302 were successfully sampled. IR 1303 experienced minimal runoff. Due to the qualifying amount of rainfall recorded, an antecedent dry period will be required prior to the next event.
  • Mesquite – Minimal runoff was observed at all of the sites.  Due to the qualifying amount of rainfall recorded, an antecedent dry period will be required prior to the next event.
  • Plano – Site were successfully sampled on July 11, 2013.
  • NTTA – Sites were ineligible for sampling due to rain on July 11, 2013.
  • TxDOT – TxDOT 1301 was successfully sampled on July 11, 2013.  Minimal runoff was observed at TxDOT 1302.  Due to the qualifying amount of rainfall recorded, an antecedent dry period will be required prior to the next event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

July 26, 2013 Storm Event

A poorly predicted large storm system brought rain mainly to the northern areas.  Storm tracking activities were initiated in the morning and one sample was collected at NTTA 1301.   The rapid formulation of the storm event did not allow for sufficient time to deploy the NTTA 1302 sampler prior to runoff at the site.  The successful sample was taken to the laboratory for analysis and met the proper holding times.

August 13, 2013 Storm Event

Scattered afternoon thunderstorms formed up across the area prior to a weak frontal system moving through the area.  Storm tracking activities were initiated in the early afternoon hours and samples were collected in the early evening.   

Atkin’s monitoring teams mobilized to the field and were able to collect 4 samples. 

  • Garland – GA 1302 and GA 1303 were successfully sampled.  GA 1301 was collected during a previously reported storm event.
  • Irving – IR 1303 was successfully sampled.  IR 1301 and IR 1302 were collected during a previously reported storm event.
  • Mesquite – MS 1301 was successfully sampled.  MS 1302 was triggered prior to the storm event.  The bottles were replaced and the sampler was reset for the next eligible event.
  • NTTA – NTTA 1302 was deployed but no rainfall was observed or recorded that resulted in runoff at the site.
  • TxDOT – TxDOT 1302 was triggered by the event but the suction line became disconnected during the event most likely the result of clogging by debris.  There was insufficient sample amount collected.  The suction line was reattached and the sampler reset for the next eligible event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

September 2, 2013 (Labor Day) Storm Event

Scattered thunderstorms moved into the region in groups from the north starting on Labor Day eve, September 1, 2013 and continued sporadically until mid-day on September 2, 2013.  Storm tracking activities were initiated during the evening hours on September 1 and continued throughout the night and into September 2 until mid-day.   

Atkin’s monitoring teams mobilized to the field for two separate thunderstorms and were able to collect two samples. 

  • Mesquite – MS 1302 was successfully sampled. 
  • NTTA – NTTA 1302 was deployed and successfully sampled.
  • TxDOT – Insufficient rainfall occurred within the TxDOT 1302 watershed.  No runoff was observed.  The sampler remains ready for the next eligible event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

September 19, 2013 Storm Event

A large area of low pressure associated with a colliding cool front and tropical air mass caused scattered thunderstorms to erupt across most of Texas on the evening of September 19th.  Storm tracking activities were initiated during the evening hours as storm cells approached the remaining site (TxDOT 1302).  Atkins deployed a monitoring team and the team successfully collected the sample.  The sample was taken to the laboratory for analysis and met the proper holding time.

Second Quarter Update

April 3, 2013 Storm Event

Easter weekend was a wet one around the Metroplex and many of our sites experienced rain both Saturday and Sunday.  The sites that received rain on Sunday were ineligible for sample collection with the storms that came through early this morning.  Storm tracking activities were initiated yesterday and although light showers fell yesterday afternoon it wasn’t until the early morning hours today that large thunderstorms produced qualifying rainfall on the sites that were eligible.   

Atkin’s monitoring teams mobilized to the field and were able to collect 6 samples.  The following is a summary for each watershed:

  • Arlington –Sites AR1301 and AR1303 were successfully sampled.  Site AR1302 experienced a rise in the stream level due to the small rainfall that fell yesterday but did not allow for a complete sample collection routine.  AR1302 has been reset and is ready for the next event.
  • Garland – Sites were ineligible for sampling due to rain on Sunday, March 31.
  • Irving – All sites were successfully sampled.
  • Mesquite – Sites were ineligible for sampling due to rain on Sunday, March 31.
  • Plano – Sites were ineligible for sampling due to rain on Sunday, March 31.
  • NTTA – Sites were ineligible for sampling due to rain on Sunday, March 31.
  • TxDOT – TxDOT 1301 was successfully sampled.  Site TxDOT 1302 experienced a rise in the stream level due to the small rainfall that fell yesterday but did not allow for a complete sample collection routine.  TxDOT 1302 has been reset and is ready for the next event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

April 10, 2013 Storm Event

Early on the morning of April 10 storm tracking activities were initiated for a frontal boundary that was approaching the area.  Light showers passed through the region first followed by heavier showers later in the morning. 

Atkin’s monitoring teams mobilized to the field and were able to collect 10 of the 11 remaining samples.  The following is a summary for each watershed.

  • Arlington –Sites AR1301 and AR1303 were successfully sampled on April 3, 2013.  Site AR1302 was successfully sampled during this event.
  • Garland – All sites were successfully sampled during this event.
  • Irving – All sites were successfully sampled on April 3, 2013.
  • Mesquite – All sites were successfully sampled during this event.
  • Plano – All sites were successfully sampled during this event.
  • NTTA – Site NTTA 1301 was successfully sampled.  Site NTTA 1302 was triggered prior to the storm event.  NTTA 1302 has been reset and is ready for the next event.
  • TxDOT – TxDOT 1301 was successfully sampled on April 3, 2013.  Site TxDOT 1302 was successfully sampled during this event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

April 18, 2013 Storm Event

Early on the morning of April 18 storm tracking activities were initiate for the yet another frontal boundary approaching the area.  Heavy showers passed through the Metroplex.  A monitoring team was mobilized to the field to collect the final sample for the quarter.  Site NTTA 1302 was successfully sampled and taken to the laboratory for analysis and met the proper holding time.

First Quarter Update

January 8, 2013 Storm Event

The Atkins Team got off to an early start this year with the major rain event that enveloped the DFW area starting on January 8.  Storm tracking activities were initiated for light showers and small thunderstorms that moved through the area. 

Atkin’s monitoring teams mobilized to the field and were able to collect 14 of the 17 samples.  The following is a summary for each watershed:

  • Arlington –Sites AR1302 and AR1303 were successfully sampled.  Due to the nature of the rainfall, Site AR1301 experienced a rise in the stream level followed by a quick return to normal levels that triggered the sample but did not allow for a complete sample collection routine.  AR1301 has been reset and is ready for the next event.
  • Garland – All sites were successfully sampled.
  • Irving – All sites were successfully sampled.
  • Mesquite – Site MS1301 was successfully sampled.  Site MS1302 experienced a programming issue causing a delay in the aliquot collection.  MS1302 has been reset and is ready for the next event.
  • Plano – All sites were successfully sampled.
  • NTTA – All sites were successfully sampled.
  • TxDOT – TxDOT 1202 was successfully sampled.  TxDOT 1201 experienced a distributor jam which did not allow the sample to be distributed into the correct sample containers.  TxDOT 1201 has been reset and is ready for the next event.

All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

January 29, 2013 Storm Event

On the evening of January 29th, storm tracking activities were initiated for light showers moving through the area. 

Atkin’s monitoring teams mobilized to the field and were able to collect the remaining samples.  The following is a summary for each watershed:

  • Arlington –AR 1301 was successfully sampled.  AR1302 and AR1303 were successfully sampled on January 8, 2013.
  • Garland – All sites were successfully sampled on January 8, 2013.
  • Irving – All sites were successfully sampled on January 8, 2013.
  • Mesquite – MS1302 was successfully sampled.  MS1301 was successfully sampled on January 8, 2013.
  • Plano – All sites were successfully sampled on January 8, 2013.
  • NTTA – All sites were successfully sampled on January 8, 2013.
  • TxDOT – TxDOT 1301 was successfully sampled.  TxDOT 1302 was successfully sampled on January 8, 2013.
All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.

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2012 Data

Fourth Quarter Update

October 13 & 14, 2012 Storm Event

On October 13, storm tracking activities were initiated due to pop-up thunderstorms in the area.  None of these storms influenced the monitoring sites.  Between midnight and 2:00 AM on October 14, a widespread rainfall event occurred across the area associated with a frontal boundary.  Atkin’s monitoring teams mobilized to the field and were able to collect 12 of the 17 samples.  All successful samples were collected and taken to the laboratory for analysis and met the proper holding times.
The following is a summary for each watershed:

  • Arlington – All sites were successfully sampled.
  • Garland –None of the Garland sites were collected.  GA 1201 and GA1203 did not collect full sample sets due to high flows in the stream which dislodged the sample intake hose.  GA 1202 did not collect a full sample set due to an error with the automatic sampler.  All sites have been reset and are ready for the next event.
  • Irving – Sites IR 1201 and IR 1203 were successfully sampled.   Site IR 1202 was triggered by a false rise prior to the storm event.  IR 1202 has been reset and is ready for the next event.
  • Mesquite – All sites were successfully sampled.
  • Plano – All sites were successfully sampled.
  • NTTA – All sites were successfully sampled.
  • TxDOT – TxDOT 1202 was successfully sampled.  TxDOT 1201 did not collect a full sample set due to an error with the automatic sampler.  TxDOT 1201 has been reset and is ready for the next event.

December 14 & 15, 2012 Storm Event

On December 14, storm tracking activities were initiated for light showers that were approaching the area.  Qualifying rain amounts fell at the remaining Irving and Garland sites on the afternoon of December 14.  Another qualifying storm event occurred around midnight on December 15 at the remaining TxDOT site.  Atkins’ monitoring teams mobilized to the field and were able to collect all of the remaining samples for this quarter.  All successful samples were taken to the laboratory for analysis and met the proper holding times.

All sites have been successfully sampled for the fourth quarter of 2012.

Third Quarter Update

July 1, 2012 Storm Event

On July 1st, a few storm cells popped up all over the area. Although most sites received some rain, only two sites received qualifying rainfall amounts. Those two were PL1201 and NTTA1201. Atkins was able to successfully capture samples at both sites.

July 7, 8, 10, 15, and 20 Storm Events

The following is an update on sampling activities from a series of storm events that hit the area mid-July:

  • Arlington – All samples were collected on July 10.
  • Garland – Sites GA1201 and GA1202 were successfully sampled on July 20. Site GA1203 was successfully sampled on July 7.
  • Irving – All samples were collected on July 8.
  • Mesquite – All sites were successfully sampled. MS1201 was sampled on July 7 and MS1202 on July 15.

August 15 Storm Event

On August 15th, a large area of rain moved across the southern portion of the Metroplex bringing rain to the TxDOT1201 and TxDOT1202 sites. Atkins successfully captured samples at both sites.

September 13 Storm Event

Sites PL1202 and NTTA1202 were successfully sampled on September 13. All sites have been successfully sampled for the 2012 third quarter.

Second Quarter Update

April 2 and 3, 2012 Storm Event


Storm tracking activities started on April 2nd. A band of severe thunderstorms approached the region from the West. The storms were part of a system that carried heavy rainfall and tornados. Atkins monitoring teams mobilized to the field on April 3rd, but all teams were instructed to find shelter due to continually developing tornadic activity. After the storms passed through the area, the Atkins teams were able to collect 13 of the 17 samples. The following is a summary for each watershed:

  • Arlington - All sites were successfully sampled.
  • Garland - Sites GA1202 and GA1203 were successfully sampled. Site GA1201 did have a successful sample; however, some of the sample jars were broken during the transport. GA1201 will be reset and ready for the next event.
  • Irving - All sites were successfully sampled.
  • Mesquite - All sites were successfully sampled.
  • Plano - Site PL1201 was successfully sampled. Site PL1202 could not be accessed within the proper time period due to tornadoes in the area. The site will be reset for the next event.
  • NTTA - Site NTTA1201 was successfully sampled. Site NTTA1202 could not be accessed in the proper time period due to tornadoes in the area. The site will be reset for the next event.
  • TxDOT - TX1202 was successfully sampled. Site TX1201 did not start sampling until after the first hour. This site will be reset for the next event.

All successful samples collected were taken to the laboratory for analysis and met the proper holding times.

April 8, 2012 Storm Event


On April 8th, a band of showers moved into the region from the West. Atkins deployed crews into the field prior to the storms. Sites GA1201, PL1202, NTTA1202, and TX1201 were all successfully sampled. All samples were taken to the laboratory for analysis and met the proper holding times.

First Quarter Update

January 9, 2012 Storm Event

Storm tracking activities started on January 8th. A frontal system moved into the region from the west during the evening. Shortly after midnight, all areas received qualifying rainfall. Crews were mobilized to the field for sample collection activities. All successful samples collected were taken to the laboratory for analysis and met the proper holding times. The following is a summary for each watershed:

  • Arlington - Due to an installation and equipment malfunction, none of the samplers were successful in collection. The suction lines have been replaced and the sites are ready for the next event.
  • Garland - Sites GA1201 and GA1202 were successfully sampled. Site GA1203 did not have sufficient volume in the last two jars. After troubleshooting, the automatic sampling arm appears to have jammed. GA1203 is reset and ready for the next event.
  • Irving - Due to an installation and equipment malfunction, none of the samplers were successful in collection. The suction lines have been replaced and the sites are ready for the next event.
  • Mesquite - All sites were successfully sampled.
  • Plano - Site PL1202 was successfully sampled. Site PL1201 did not sample due to a program malfunction. The site has been reset and is ready for the next event.
  • NTTA - All sites were successfully sampled.
  • TxDOT - All sites were successfully sampled.

January 24, 2012 Storm Event

Storm tracking activities began on January 24th. A frontal system moved across the region from the west throughout the early evening hours producing a qualifying rain event. All samples were submitted to the laboratory within the proper holding times. The following sites were sampled:

  • Arlington - AR1201, AR1202, and AR1203
  • Garland - GA1203
  • Irving - IR1201 and IR1202 (IR1203 was not sampled due to insufficient runoff at the site)
  • Plano - PL1201

February 13, 2012 Storm Event


Storm tracking activities began on February 13th. A frontal system moved across the region from the west throughout the morning producing a qualifying rain event. Irving IR1203 was successfully sampled. All samples were submitted to the laboratory within the proper holding times.

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