ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						41
						</td>
						<td>
						53
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>APR-JUN&nbsp;2025</td>
						<td>
						1,813&nbsp;ug/l
						</td>
						<td>
						10.0&nbsp;ug/l
						</td>
						<td>
						168&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						38
						</td>
						<td>
						57
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>JAN-MAR&nbsp;2025</td>
						<td>
						1,462&nbsp;ug/l
						</td>
						<td>
						16.3&nbsp;ug/l
						</td>
						<td>
						136&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						42
						</td>
						<td>
						53
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>OCT-DEC&nbsp;2024</td>
						<td>
						1,372&nbsp;ug/l
						</td>
						<td>
						62.2&nbsp;ug/l
						</td>
						<td>
						162&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						36
						</td>
						<td>
						41
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>JUL-SEP&nbsp;2024</td>
						<td>
						1,337&nbsp;ug/l
						</td>
						<td>
						12.3&nbsp;ug/l
						</td>
						<td>
						109&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						40
						</td>
						<td>
						51
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>APR-JUN&nbsp;2024</td>
						<td>
						1,862&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						147&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						42
						</td>
						<td>
						51
						</td>
					</tr>
					
					<tr style="background-color:#eeeeee;">
						<td>JAN-MAR&nbsp;2024</td>
						<td>
						1,336&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						128&nbsp;ug/l
						</td>
						<td>
						
						<img src="/images/images_standard/icon_nodata.gif" alt="No Data Available" />
						
						</td>
						<td>
						36
						</td>
						<td>
						44
						</td>
					</tr>
					
					<tr class="warning">
						<td>Five Year Seasonal Graph</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/seasonal_graph_wshed.aspx?wshedid=6&amp;data=TN_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/seasonal_graph_wshed.aspx?wshedid=6&amp;data=NO3_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/seasonal_graph_wshed.aspx?wshedid=6&amp;data=TP_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/seasonal_graph_wshed.aspx?wshedid=6&amp;data=OP_MGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
					</tr>
					
					<tr class="warning">
						<td>Five Year Graph of All Samples</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/graph_it_wshed.aspx?wshedid=6&amp;data=TN_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/graph_it_wshed.aspx?wshedid=6&amp;data=NO3_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/graph_it_wshed.aspx?wshedid=6&amp;data=TP_UGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
						<td>
						
							<ul class="iconList">
								<li class="graph"><a href="/graphs20/graph_it_wshed.aspx?wshedid=6&amp;data=OP_MGL&amp;datatype=lake" onclick="return popup(this.href, 'graph_wells',600,800,'yes');">Graph</a></li>
							</ul>
						
						</td>
					</tr>
					</tbody>
				</table>	
                <br/><span class="source">Source(s): 
					<a href="https://wateratlas.usf.edu/shared/metadata.asp?id=LAKELAND_WQ" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Water quality data collected by the City of Lakeland</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=LAKEWATCH_V" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">LAKEWATCH Volunteer Water Quality Monitoring</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=LEGACYSTORET_21FLA" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP Historic Data from Legacy STORET</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=POLKCO_NRD_WQ" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Polk County Parks & Natural Resources Division</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLBRA" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Biological Research Associates
</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLGFWF" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Florida Fish and Wildlife Conservation Commission Water Quality Data</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLGW" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP Watershed Monitoring Section</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLPOLK" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Polk County Natural Resources Division</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLSWFD" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">SWFWMD Water Quality Sampling Data</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLTPA" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP Southwest Regional Operations Center</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=STORET_21FLWQSP" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP, Water Quality Standards and Special Projects (Florida)</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=SWFWMD_LAKES_WQ" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">SWFWMD Water Quality Monitoring Program Data</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLCEN" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP - Central Regional Operations Center</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLGW" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP Watershed Monitoring Section</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLKWAT" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Florida LAKEWATCH</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLPOLK" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Polk County Natural Resources Division</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLSWFD" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">Southwest Florida Water Management District</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLTPA" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP - Southwest Regional Operations Center</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_21FLWQA" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">FDEP - Watershed Assessment Section</a>, <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=WIN_LAKELAND" onclick="return popup(this.href, 'metadataPopup', 540, 500, 'yes')">City of Lakeland</a>                  
				</span>
				
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					<li class="smalllink"><a href="/links/">View Water Quality Data on a Lake or River Page for More Detailed Data</a></li>
					<li class="smallmap"><a href="http://maps.wateratlas.usf.edu/polk/">View a Map of Annual Average Nitrogen for Lakes and Rivers Within the Mapping Interface</a></li>
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                <h2>Groundwater Quantity: Aquifer Resource Indicator</h2>
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                    <p>
                        Southwest Florida Water Management District calculates the Aquifer Resource Indicator (ARI)
                        for their three groundwater regions each month. The ARI was created to provide the public
                        with a gauge of groundwater levels in their area, so they can develop an understanding 
                        of the severity and cycles of drought and recovery.  The three regions include: North 
                        (Citrus, Hernando, Lake, Levy, Marion, and Sumter counties), Central (Hillsborough, Pasco, 
                        Pinellas, and Polk counties), and South (Charlotte, DeSoto, Hardee, Highlands, Manatee, 
                        and Sarasota counties).  <a href="/library/learn-more/learnmore.aspx?toolsection=lm_ari" class="lm">Learn More about the Aquifer Resource Indicator >></a>
                    </p>

                    <p>To determine the ARI for a region, each well is compared weekly to its respective low-normal value and the difference is calculated. The weekly differences are reduced to a monthly value for all monitoring wells within a region, and the resulting ARI value represents how far water levels in the aquifer must rise or fall to reach their respective low-normal values.</p>

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                    <span class="source">Source: <a href="https://wateratlas.usf.edu/shared/metadata.asp?id=SWFWMD_HYDRO" rel="fancybox-popup">SWFWMD Hydrologic Data Section Data</a></span><br />

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