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Water Issues : Oklahoma, Louisiana, New Mex., Tx

kiwibird

kiwibird

Editor, Senior Moderator
Oklahoma

Raising the MCL to 20 ppm nitrate-nitrogen would not be without precedent. Oklahoma, for example, maintained an MCL of 20 ppm until 1994, when EPA pressured the state to adopt the federal standard. Despite the higher MCL, Oklahoma had only one blue baby case reported in public health records over the past 40 years.

With the adoption of the lower federal MCL, some 20 rural Oklahoma communities suddenly face huge costs to solve a health problem none has ever experienced. For example, the small town of Hennessey, Oklahoma (population 2,058) is facing nearly $2 million in water treatment equipment costs, sizeable annual maintenance expenditures, and at least a doubling of the town?s annual water use. All of the additional water used will be waste water from continually flushing the membrane filtration system in an area already short of water. The purpose of all this expense and waste? Reducing the nitrate levels in the town?s water from 12 ppm to 9.9 ppm nitrate-nitrogen. This is just one tiny town in one state.
Click to expand...
http://www.heartland.org/publicatio.../Nitrate_Alarmists_Cost_Consumers_Plenty.html
<table border="1" cellpadding="5" cellspacing="0" width="95%"><tbody><tr><th>Rank</th><th>System </th><th>Population Served </th><th>Positive test results of total reported tests </th><th>Average Level
(Range)</th></tr><tr><td>1</td><td>Okarche Rwd
Okarche, OK</td><td align="right">250</td><td align="center">6 of 7</td><td align="right">14.71 ppm
(0 to 17.92 ppm)</td></tr><tr><td>2</td><td>Waynoka
Waynoka, OK</td><td align="right">993</td><td align="center">11 of 11</td><td align="right">13.32 ppm
(12 to 14.7 ppm)</td></tr><tr><td>3</td><td>Cordell
Cordell, OK</td><td align="right">2,903</td><td align="center">10 of 11</td><td align="right">13.23 ppm
(0 to 19.45 ppm)</td></tr><tr><td>4</td><td>Hollis
Hollis, OK</td><td align="right">2,264</td><td align="center">11 of 11</td><td align="right">12.6 ppm
(9.57 to 14.5 ppm)</td></tr><tr><td>5</td><td>Hennessey
Hennessey, OK</td><td align="right">2,058</td><td align="center">10 of 10</td><td align="right">12.19 ppm
(10.76 to 13.56 ppm)</td></tr><tr><td>6</td><td>Canadian Co Rwd # 1
Calumet, OK</td><td align="right">650</td><td align="center">10 of 10</td><td align="right">10.88 ppm
(10.09 to 12.51 ppm)</td></tr><tr><td>7</td><td>Okarche
Okarche, OK</td><td align="right">1,110</td><td align="center">7 of 7</td><td align="right">10.67 ppm
(10.09 to 11.19 ppm)</td></tr><tr><td>8</td><td>Deer Creek
Deer Creek, OK</td><td align="right">147</td><td align="center">2 of 2</td><td align="right">10.66 ppm
(8 to 13.32 ppm)</td></tr><tr><td>9</td><td>Greenfield Public Water Authority
Greenfield, OK</td><td align="right">123</td><td align="center">8 of 8</td><td align="right">10.61 ppm
(9.68 to 11.12 ppm)</td></tr><tr><td>10</td><td>Beckham Co Rwd # 1
Carter, OK</td><td align="right">2,100</td><td align="center">8 of 8</td><td align="right">10.24 ppm
(6.22 to 11.32 ppm)</td></tr></tbody></table>http://www.ewg.org/tapwater/statereports/state_contaminant.php?state=OK&contam=1038

According to the U.S. Geological Survey, Lake Hefner is currently down 10 feet. The expanding shoreline of the drought-stricken drinking water reservoir has raised the concerns of the community, particularly recreation enthusiasts.
Click to expand...
http://www.okc.gov/news/2006_11/hefner_q_&_a.html

The City of Oklahoma appears to be supplied with water from Lake Hefner that has a low level of Nitrate:http://www.ewg.org/tapwater/yourwater/system.php?pwsid=OK1020902
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

Texas:
<table valign="TOP" border="0" cellpadding="4<TR" cellspacing="0"><tbody><tr><td align="right">17,387,944

</td><td>People drinking water contaminated with Nitrate in Texas</td></tr><tr><td align="right">2,782

</td><td>Communities served water contaminated with Nitrate in Texas</td></tr><tr><td align="right">48,336

</td><td>People drinking water contaminated with Nitrate over health based limits in Texas</td></tr><tr><td align="right">46

</td><td>Communities served water with Nitrate above health based limits in Texas</td></tr></tbody></table>Table. The most polluted communities in Texas

48,000 Americans in 46 Texas communities were served tap water contaminated with Nitrate above health based limits between 1998 and 2003
Ranked by highest average Nitrate level
<table border="1" cellpadding="5" cellspacing="0" width="95%"><tbody><tr><th>Rank</th><th>System </th><th>Population Served </th><th>Positive test results of total reported tests </th><th>Average Level
(Range)</th></tr><tr><td>1</td><td>Eola Water Supply Commission
Eola, TX</td><td align="right">210</td><td align="center">17 of 17</td><td align="right">22.26 ppm
(19.59 to 32.76 ppm)</td></tr><tr><td>2</td><td>Rra Lockett Water System
Wichita Falls, TX</td><td align="right">723</td><td align="center">15 of 15</td><td align="right">21.1 ppm
(6.89 to 23.93 ppm)</td></tr><tr><td>3</td><td>Flomot Water Association
Flomot, TX</td><td align="right">78</td><td align="center">12 of 12</td><td align="right">18.43 ppm
(17.6 to 19.37 ppm)</td></tr><tr><td>4</td><td>Turkey Municipal Water System
Turkey, TX</td><td align="right">500</td><td align="center">15 of 15</td><td align="right">16.45 ppm
(13.08 to 18.4 ppm)</td></tr><tr><td>5</td><td>Valley View Mobile Home Park
Midland, TX</td><td align="right">51</td><td align="center">8 of 8</td><td align="right">15.9 ppm
(14.36 to 17.06 ppm)</td></tr><tr><td>6</td><td>City of Burkburnett
Burkburnett, TX</td><td align="right">10,927</td><td align="center">17 of 17</td><td align="right">15.69 ppm
(1.08 to 20.03 ppm)</td></tr><tr><td>7</td><td>Rra Truscott Gilliland Water System
Wichita Falls, TX</td><td align="right">306</td><td align="center">14 of 14</td><td align="right">15.09 ppm
(13.65 to 18.73 ppm)</td></tr><tr><td>8</td><td>City of Vernon
Vernon, TX</td><td align="right">12,058</td><td align="center">15 of 15</td><td align="right">14.97 ppm
(13.89 to 16.23 ppm)</td></tr><tr><td>9</td><td>City of Quitaque
Quitaque, TX</td><td align="right">463</td><td align="center">16 of 16</td><td align="right">14.36 ppm
(13.6 to 15.59 ppm)</td></tr><tr><td>10</td><td>Family Community Center Mhp
Lubbock, TX</td><td align="right">700</td><td align="center">5 of 5</td><td align="right">14.32 ppm
(12.74 to 16.5 ppm)</td></tr></tbody></table>http://www.google.co.nz/#q=texas+nitrate+levels+water+dallas+&hl=en&sa=2&fp=eb88b7d13fadd67f
cont..
Table. The most polluted communities in Texas

48,000 Americans in 46 Texas communities were served tap water contaminated with Nitrate above health based limits between 1998 and 2003
Ranked by highest average Nitrate level
<table border="1" cellpadding="5" cellspacing="0" width="95%"><tbody><tr><th>Rank</th><th>System </th><th>Population Served </th><th>Positive test results of total reported tests </th><th>Average Level
(Range)</th></tr><tr><td>1</td><td>Eola Water Supply Commission
Eola, TX</td><td align="right">210</td><td align="center">17 of 17</td><td align="right">22.26 ppm
(19.59 to 32.76 ppm)</td></tr><tr><td>2</td><td>Rra Lockett Water System
Wichita Falls, TX</td><td align="right">723</td><td align="center">15 of 15</td><td align="right">21.1 ppm
(6.89 to 23.93 ppm)</td></tr><tr><td>3</td><td>Flomot Water Association
Flomot, TX</td><td align="right">78</td><td align="center">12 of 12</td><td align="right">18.43 ppm
(17.6 to 19.37 ppm)</td></tr><tr><td>4</td><td>Turkey Municipal Water System
Turkey, TX</td><td align="right">500</td><td align="center">15 of 15</td><td align="right">16.45 ppm
(13.08 to 18.4 ppm)</td></tr><tr><td>5</td><td>Valley View Mobile Home Park
Midland, TX</td><td align="right">51</td><td align="center">8 of 8</td><td align="right">15.9 ppm
(14.36 to 17.06 ppm)</td></tr><tr><td>6</td><td>City of Burkburnett
Burkburnett, TX</td><td align="right">10,927</td><td align="center">17 of 17</td><td align="right">15.69 ppm
(1.08 to 20.03 ppm)</td></tr><tr><td>7</td><td>Rra Truscott Gilliland Water System
Wichita Falls, TX</td><td align="right">306</td><td align="center">14 of 14</td><td align="right">15.09 ppm
(13.65 to 18.73 ppm)</td></tr><tr><td>8</td><td>City of Vernon
Vernon, TX</td><td align="right">12,058</td><td align="center">15 of 15</td><td align="right">14.97 ppm
(13.89 to 16.23 ppm)</td></tr><tr><td>9</td><td>City of Quitaque
Quitaque, TX</td><td align="right">463</td><td align="center">16 of 16</td><td align="right">14.36 ppm
(13.6 to 15.59 ppm)</td></tr><tr><td>10</td><td>Family Community Center Mhp
Lubbock, TX</td><td align="right">700</td><td align="center">5 of 5</td><td align="right">14.32 ppm
(12.74 to 16.5 ppm)</td></tr><tr><td>11</td><td>Dodson Water Works
Dodson, TX</td><td align="right">134</td><td align="center">11 of 11</td><td align="right">13.81 ppm
(12.75 to 14.45 ppm)</td></tr><tr><td>12</td><td>City of Miles
Miles, TX</td><td align="right">792</td><td align="center">11 of 11</td><td align="right">13.69 ppm
(5.38 to 27.35 ppm)</td></tr><tr><td>13</td><td>Welch Water Supply Commission
Welch, TX</td><td align="right">354</td><td align="center">13 of 14</td><td align="right">13.44 ppm
(0 to 19.67 ppm)</td></tr><tr><td>14</td><td>Charlie Water Supply Commission
Wichita Falls, TX</td><td align="right">122</td><td align="center">12 of 12</td><td align="right">13.43 ppm
(2.7 to 24.75 ppm)</td></tr><tr><td>15</td><td>City of Thrall
Thrall, TX</td><td align="right">870</td><td align="center">6 of 6</td><td align="right">12.71 ppm
(0.1 to 41.2 ppm)</td></tr><tr><td>16</td><td>City Of Weinert
Weinert, TX</td><td align="right">176</td><td align="center">15 of 16</td><td align="right">12.22 ppm
(0 to 14.91 ppm)</td></tr><tr><td>17</td><td>City of Roscoe
Roscoe, TX</td><td align="right">1,378</td><td align="center">18 of 19</td><td align="right">12.18 ppm
(0 to 14.2 ppm)</td></tr><tr><td>18</td><td>Whitharral Water Supply Commission
Littlefield, TX</td><td align="right">275</td><td align="center">8 of 8</td><td align="right">12.04 ppm
(10.81 to 14.73 ppm)</td></tr><tr><td>19</td><td>City of Byers
Byers, TX</td><td align="right">839</td><td align="center">12 of 12</td><td align="right">11.66 ppm
(6.66 to 15.6 ppm)</td></tr><tr><td>20</td><td>Greenwood Ventures Inc.
Midland, TX</td><td align="right">200</td><td align="center">10 of 10</td><td align="right">11.63 ppm
(8.67 to 15.75 ppm)</td></tr></tbody></table><table border="1" cellpadding="5" cellspacing="0" width="95%"><tbody><tr><td>21</td><td>Grassland Water Supply Commission
Post, TX</td><td align="right">75</td><td align="center">9 of 9</td><td align="right">11.43 ppm
(10.3 to 12.13 ppm)</td></tr><tr><td>22</td><td>Country Village Mobile Home Estates
Midland, TX</td><td align="right">108</td><td align="center">4 of 4</td><td align="right">11.29 ppm
(11.02 to 11.7 ppm)</td></tr><tr><td>23</td><td>Country Squire Mhp 1
Lubbock, TX</td><td align="right">60</td><td align="center">7 of 7</td><td align="right">10.89 ppm
(10.06 to 11.97 ppm)</td></tr><tr><td>24</td><td>Rra Guthrie Dumont Water System
Wichita Falls, TX</td><td align="right">250</td><td align="center">10 of 10</td><td align="right">10.8 ppm
(9.59 to 11.46 ppm)</td></tr><tr><td>25</td><td>Devilla Mobile Home Park
Odessa, TX</td><td align="right">56</td><td align="center">14 of 14</td><td align="right">10.5 ppm
(9.36 to 12.27 ppm)</td></tr><tr><td>26</td><td>Rra Dodson Water System
Wichita Falls, TX</td><td align="right">300</td><td align="center">13 of 13</td><td align="right">10.37 ppm
(8.41 to 12.34 ppm)</td></tr><tr><td>27</td><td>Texin Enterprises Water System
Lubbock, TX</td><td align="right">30</td><td align="center">5 of 5</td><td align="right">10.31 ppm
(8.9 to 11.53 ppm)</td></tr><tr><td>28</td><td>Huber Garden Estates
Odessa, TX</td><td align="right">75</td><td align="center">16 of 16</td><td align="right">10.17 ppm
(7.82 to 12.73 ppm)</td></tr><tr><td>29</td><td>Twin Oaks Mobile Home Park
Midland, TX</td><td align="right">234</td><td align="center">12 of 14</td><td align="right">10.06 ppm
(0 to 12.82 ppm)</td></tr><tr><td>30</td><td>City of Rule
Rule, TX</td><td align="right">688</td><td align="center">11 of 11</td><td align="right">9.96 ppm
(7.1 to 17.49 ppm)</td></tr><tr><td>31</td><td>South Midland County Water System Inc.
Midland, TX</td><td align="right">256</td><td align="center">10 of 11</td><td align="right">9.68 ppm
(0 to 11.49 ppm)</td></tr><tr><td>32</td><td>Stahl 1
LUBBOCK, TX</td><td align="right">42</td><td align="center">7 of 7</td><td align="right">9.37 ppm
(9.01 to 10.09 ppm)</td></tr><tr><td>33</td><td>Franklin Estates South
Lubbock, TX</td><td align="right">152</td><td align="center">14 of 14</td><td align="right">9.28 ppm
(8.2 to 12.42 ppm)</td></tr><tr><td>34</td><td>Western Terrace Mobile Home Park
LUBBOCK, TX</td><td align="right">36</td><td align="center">8 of 9</td><td align="right">9.19 ppm
(0 to 11.54 ppm)</td></tr><tr><td>35</td><td>Wellington Municipal Water System
Wellington, TX</td><td align="right">2,340</td><td align="center">10 of 10</td><td align="right">8.6 ppm
(7.05 to 10.17 ppm)</td></tr><tr><td>36</td><td>Martin County Fwsd 1
Lenorah, TX</td><td align="right">50</td><td align="center">4 of 4</td><td align="right">8.56 ppm
(7.77 to 10.33 ppm)</td></tr><tr><td>37</td><td>North University Estates
Lubbock, TX</td><td align="right">575</td><td align="center">7 of 7</td><td align="right">7.76 ppm
(5.85 to 10.96 ppm)</td></tr><tr><td>38</td><td>Deer Country Water System
Llano, TX</td><td align="right">63</td><td align="center">9 of 10</td><td align="right">7.36 ppm
(0 to 13.44 ppm)</td></tr><tr><td>39</td><td>Mclean Municipal Water Supply
Mclean, TX</td><td align="right">860</td><td align="center">8 of 8</td><td align="right">7.15 ppm
(3.91 to 12.85 ppm)</td></tr><tr><td>40</td><td>City of New Deal
New Deal, TX</td><td align="right">850</td><td align="center">2 of 2</td><td align="right">7.03 ppm
(2.12 to 11.94 ppm)</td></tr></tbody></table><table border="1" cellpadding="5" cellspacing="0" width="95%"><tbody><tr><td>41</td><td>Thalia Water Supply Commission
Crowell, TX</td><td align="right">250</td><td align="center">10 of 10</td><td align="right">6.98 ppm
(2.89 to 14.23 ppm)</td></tr><tr><td>42</td><td>Wheeler Municipal Water System
Wheeler, TX</td><td align="right">1,370</td><td align="center">11 of 12</td><td align="right">6.58 ppm
(0 to 13.12 ppm)</td></tr><tr><td>43</td><td>Noack Water Supply Commission
Thrall, TX</td><td align="right">494</td><td align="center">6 of 6</td><td align="right">6.5 ppm
(0.95 to 24.2 ppm)</td></tr><tr><td>44</td><td>Tahoka Public Water System
Tahoka, TX</td><td align="right">2,910</td><td align="center">8 of 9</td><td align="right">5.77 ppm
(0 to 12.97 ppm)</td></tr><tr><td>45</td><td>City of Stanton
Stanton, TX</td><td align="right">2,556</td><td align="center">15 of 16</td><td align="right">5.11 ppm
(0 to 11.05 ppm)</td></tr><tr><td>46</td><td>Colorado River Mwd Snyder Well Field
BIG SPRING, TX</td><td align="right">2,500</td><td align="center">9 of 9</td><td align="right">5.01 ppm
(1.27 to 10.8 ppm)</td></tr></tbody></table>
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

Texas:
aipgnitrate.jpg

http://aeg-tx.org/geo.asp
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

Texas
Seymour Aquifer Water Quality (Completed)

The Seymour Aquifer is a shallow aquifer in Northwest Central Texas and the only major source of groundwater in Haskell, Jones and Knox counties. The aquifer underlies 300,000 plus acres and provides drinking and domestic water for many rural families. In addition, over 3,000 wells furnish water for irrigation and livestock use.

The State of Texas has identified elevated nitrate levels as a concern in the Seymour Aquifer. In more than 75 percent of the wells tested, nitrate levels exceed the federal safe drinking water standard of 10 ppm nitrate-nitrogen. Nitrate levels have been documented in some wells as high as 35 ppm nitrate-nitrogen.

To remove this threat, the Seymour Aquifer Water Quality Improvement Project is working to provide water quality education and technical assistance to irrigators for best management practices (BMPs) implementation to reduce nitrate concentrations in the Seymour Aquifer. The project also provides cost-share assistance to replace existing irrigation systems commonly used in the area with drip irrigation systems at a cost-share rate of 60 percent.

Project leaders hope this program will serve as a catalyst to encourage the installation of drip irrigation systems as a BMP to improve water quality and maintain water supplies in the aquifer.
Click to expand...
http://twri.tamu.edu/project-info/SeymourAquifer/
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

Texas: El Paso
Hydrogeologic and water quality issues along the El Paso/Juarez Corridor; an international case study
Barry J. Hibbs

California State University, Department of Geological Science, Los Angeles, CA, United States

The twin cities of EI Paso, Texas, and Juarez, in Chihuahua, Mexico, depend heavily upon well water from the Hueco Bolson aquifer for municipal and industrial water needs. Over-pumping of the Hueco Bolson aquifer has resulted in drawdown of the water table (as much as 150 ft [45.7 m]) and salinization by brackish water encroachment. Predevelopment ground-water flow pathlines ran from recharge areas along mountains to discharge areas at the Rio Grande. Pumping cones of depression beneath EI Paso and Juarez have reoriented the hydraulic gradient, capturing the natural discharge of the aquifer. The deeper cone of depression is beneath Juarez. At one location in the aquifer, ground water now flows under the international border from the United States into Mexico. Chloride and other dissolved solids have increased over time in many municipal wells of EI Paso and Juarez. Salinization of water wells is associated with extensive ground-water development and arid climate. A freshwater zone beneath EI Paso and Juarez is underlain and in some places overlain by inferior-quality ground water. Mixing due to pumping, leakage from mud interbeds and artesian confining beds, cascading waters along well casings and screens, lateral saltwater encroachment, and potential upconing have degraded the freshwater zone. Other contaminants of concern in the aquifer include fecal coliform bacteria, and nitrate. Of particular concern are fecal coliform bacteria because many residents in Mexico use untreated well water.

This record provided courtesy of AGI/GeoRef.
Click to expand...
http://eeg.geoscienceworld.org/cgi/content/abstract/5/1/27
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

http://images.google.co.nz/imgres?i...&sa=N&start=20&um=1&ei=XavCSpvcNZDQswP6pu37Ag

[FONT=Trebuchet MS, Arial, Helvetica]The map below shows potential sources of contamination along with groundwater public water supplies. This map provides a visual representation for the magnitude of the task of protecting groundwater from contamination. Potential sources of contamination are not geographically separated from public water supplies to any considerable degree. On a map of this scale, the two appear to be overlapping in many cases.[/FONT] <v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"> <v:stroke joinstyle="miter"> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"> <v:f eqn="sum @0 1 0"> <v:f eqn="sum 0 0 @1"> <v:f eqn="prod @2 1 2"> <v:f eqn="prod @3 21600 pixelWidth"> <v:f eqn="prod @3 21600 pixelHeight"> <v:f eqn="sum @0 0 1"> <v:f eqn="prod @6 1 2"> <v:f eqn="prod @7 21600 pixelWidth"> <v:f eqn="sum @8 21600 0"> <v:f eqn="prod @7 21600 pixelHeight"> <v:f eqn="sum @10 21600 0"> </v:f> <v:path o:connecttype="rect" gradientshapeok="t" o:extrusionok="f"> <o:lock aspectratio="t" v:ext="edit"> </o:lock> <v:shape id="_x0000_i1025" style="width: 6in; height: 567pt;" type="#_x0000_t75"> <v:imagedata o:title="" src="file:///C:/DOCUME%7E1/stokessn/LOCALS%7E1/Temp/msoclip1/01/clip_image001.wmz"> </v:imagedata> [FONT=Trebuchet MS, Arial, Helvetica]
final.6.jpg
</v:shape></v:path></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:formulas></v:stroke></v:shapetype>[/FONT]

[FONT=Trebuchet MS, Arial, Helvetica]This map displays the potential sources of contamination which are in the map above, as well as municipal landfills as PSOCs. Anywhere that human populations reside, landfills must be built. Although regulations exist on the types of waste that can be placed in a municipal landfill (i.e. no hazardous waste), municipal landfill leachate can still be dangerous to human health if it reaches the water supply. Therefore, when all potential sources of contamination are considered the entire state is covered. The potential sources of contamination plots were created using data from TNRIS on water quality.[/FONT]
[FONT=Trebuchet MS, Arial, Helvetica]
final.5.jpg
[/FONT]​
 
Re: Water Issues : Oklahoma, Louisiana, New Mex., Tx

Corpus Christi, Nueces County, Texas
City of Corpus Christi Health Summary

<table border="1" cellpadding="5" cellspacing="0" width="100%"><tbody><tr><th>Health Effect</th><th colspan="2">Contaminants</th></tr><tr><td valign="top">Cardiovascular or Blood Toxicity (known or suspected)</td><td>Nitrate
Dichloromethane (methylene chloride)
Aluminum
Bromodichloromethane
Selenium (total)
Copper
Arsenic (total)
Dibromochloromethane
Chloroform
</td><td valign="top">9</td></tr><tr><td valign="top">Cancer (known)</td><td>Dichloroacetic acid
</td><td valign="top">1</td></tr><tr><td valign="top">Cancer (suspected)</td><td>Trichloroacetic acid
Atrazine
Chromium (total)
Metolachlor
Total trihalomethanes (TTHMs)
</td><td valign="top">5</td></tr><tr><td valign="top">Developmental Toxicity (suspected)</td><td>Barium (total)
</td><td valign="top">1</td></tr><tr><td valign="top">Endocrine Toxicity (known or suspected)</td><td>Dibromoacetic acid
</td><td valign="top">1</td></tr><tr><td valign="top">Gastrointestinal or Liver Toxicity (known or suspected)</td><td>Manganese
</td><td valign="top">1</td></tr><tr><td valign="top">Neurotoxicity (known or suspected)</td><td>Bromoform
</td><td valign="top">1</td></tr><tr><td valign="top">Skin Sensitivity (known or suspected)</td><td>Monochloroacetic acid
</td><td>1</td></tr></tbody></table>
Click to expand...
Contaminants found above health based limits: 6*

Contaminants listed may not have exceeded legal limits, which are set to balance cost and benefits and are often higher than health-based limits - see note below.
<table align="center" border="1" cellpadding="5" cellspacing="0"><tbody><tr><th>Contaminant Name</th><th>Average Result</th><th>Maximum Result</th><th>Health Limit Exceeded</th><th>Has Legal Limit</th><th>Legal Limit Exceeded</th></tr><tr><td rowspan="2">Arsenic (total)</td><td>2.38 ppb</td><td>5.5 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Metal that enters water by erosion of natural deposits, runoff from glass and electronics processing</td></tr><tr><td rowspan="2">Bromodichloromethane</td><td>11.36 ppb</td><td>39.2 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Disinfection by-product</td></tr><tr><td rowspan="2">Bromoform</td><td>4.59 ppb</td><td>22.8 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Disinfection by-product</td></tr><tr><td rowspan="2">Chloroform</td><td>9.68 ppb</td><td>45.86 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Disinfection by-product</td></tr><tr><td rowspan="2">Dibromochloromethane</td><td>8.76 ppb</td><td>34.3 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Disinfection by-product</td></tr><tr><td rowspan="2">Total haloacetic acids</td><td>54.98 ppb</td><td>98.15 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Measure of disinfection by-products; refers to the sum of the concentrations of dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid in a water sample.</td></tr><tr><td rowspan="2">Total trihalomethanes (TTHMs)</td><td>17.78 ppb</td><td>101.12 ppb</td><td align="center">Yes</td><td align="center">Yes</td><td align="center">No</td></tr><tr><td colspan="5">Measure of four disinfection by-products</td></tr></tbody></table>
* This table contains one or more listings for a chemical group which comprises individual chemicals that are also listed in the table. The chemical group is not counted separately in numbers presented for total chemicals detected.
NOTE: Health based limits included in this analysis include enforceable drinking water limits (called Maximum Contaminant Limits, or MCLs) as well as governmental, non-enforceable health guidelines, such as Maximum Contaminant Limit Goals (MCLGs), lifetime health advisory levels, one-day and ten-day advisory levels to protect children from non-cancer health endpoints, and other government-established health guidelines for tap water contaminants.
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http://www.ewg.org/tapwater/yourwater/system.php?pwsid=TX1780003
 
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