");vwo_$('head').append(_vwo_sel);return vwo_$('head')[0] && vwo_$('head')[0].lastChild;})("HEAD")}}},rules:[{"triggers":["8639604"],"tags":[{"id":"metric","data":{"campaigns":[{"g":1,"c":64}],"type":"m"},"metricId":951908},{"id":"metric","data":{"campaigns":[{"g":1,"c":63}],"type":"m"},"metricId":951908},{"id":"metric","data":{"campaigns":[{"g":1,"c":48}],"type":"m"},"metricId":951908}]},{"triggers":["8536409"],"tags":[{"id":"metric","data":{"campaigns":[{"g":4,"c":64}],"type":"m"},"metricId":959027},{"id":"metric","data":{"campaigns":[{"g":4,"c":63}],"type":"m"},"metricId":959027},{"id":"metric","data":{"campaigns":[{"g":5,"c":48}],"type":"m"},"metricId":959027}]},{"triggers":["8459768"],"tags":[{"id":"metric","data":{"campaigns":[{"g":5,"c":64}],"type":"m"},"metricId":951905},{"id":"metric","data":{"campaigns":[{"g":5,"c":63}],"type":"m"},"metricId":951905},{"id":"metric","data":{"campaigns":[{"g":2,"c":48}],"type":"m"},"metricId":951905}]},{"triggers":["8536415"],"tags":[{"id":"metric","data":{"campaigns":[{"g":2,"c":64}],"type":"m"},"metricId":959033},{"id":"metric","data":{"campaigns":[{"g":2,"c":63}],"type":"m"},"metricId":959033},{"id":"metric","data":{"campaigns":[{"g":3,"c":48}],"type":"m"},"metricId":959033}]},{"triggers":["13099398"],"tags":[{"id":"metric","data":{"campaigns":[{"g":1,"c":66}],"type":"g"},"metricId":0}]},{"triggers":["10589191"],"tags":[{"id":"runCampaign","data":"campaigns.64","priority":4},{"id":"runCampaign","data":"campaigns.63","priority":4},{"id":"runCampaign","data":"campaigns.48","priority":4},{"id":"runCampaign","data":"campaigns.66","priority":4}]},{"triggers":["8536412"],"tags":[{"id":"metric","data":{"campaigns":[{"g":3,"c":64}],"type":"m"},"metricId":959030},{"id":"metric","data":{"campaigns":[{"g":3,"c":63}],"type":"m"},"metricId":959030},{"id":"metric","data":{"campaigns":[{"g":4,"c":48}],"type":"m"},"metricId":959030}]},{"triggers":["8"],"tags":[{"id":"prePostMutation","priority":3},{"id":"groupCampaigns","priority":2}]},{"triggers":["9"],"tags":[{"id":"visibilityService","priority":2}]},{"triggers":["2"],"tags":[{"id":"runTestCampaign"}]},{"triggers":["75"],"tags":[{"id":"urlChange"}]},{"triggers":["5"],"tags":[{"id":"checkEnvironment"}]}],pages:{"ec":[{"1625289":{"inc":["o",["url","urlReg","(?i).*"]]}},{"2183589":{"inc":["o",["pg","eq","141375"]]}}],"pc":[{"141375":{"inc":["o",["url","urlReg","(?i)^https?\\:\\\/\\\/(w{3}\\.)?mprnews\\.org\\\/story.*"],["url","urlReg","(?i)^https?\\:\\\/\\\/(w{3}\\.)?mprnews\\.org\\\/episode.*"]]}}]},pagesEval:{"ec":[1625289,2183589],"pc":[141375]},stags:{}}})(); ;;var commonWrapper=function(argument){if(!argument){argument={valuesGetter:function(){return{}},valuesSetter:function(){},verifyData:function(){return{}}}}const getVisitorUuid=function(){if(window._vwo_acc_id>=1037725){return window.VWO&&window.VWO.get("visitor.id")}else{return window.VWO._&&window.VWO._.cookies&&window.VWO._.cookies.get("_vwo_uuid")}};var pollInterval=100;var timeout=6e4;return function(){var accountIntegrationSettings={};var _interval=null;function waitForAnalyticsVariables(){try{accountIntegrationSettings=argument.valuesGetter();accountIntegrationSettings.visitorUuid=getVisitorUuid()}catch(error){accountIntegrationSettings=undefined}if(accountIntegrationSettings&&argument.verifyData(accountIntegrationSettings)){argument.valuesSetter(accountIntegrationSettings);return 1}return 0}var currentTime=0;_interval=setInterval((function(){currentTime=currentTime||performance.now();var result=waitForAnalyticsVariables();if(result||performance.now()-currentTime>=timeout){clearInterval(_interval)}}),pollInterval)}}; var pushBasedCommonWrapper=function(argument){var firedCamp={};if(!argument){argument={integrationName:"",getExperimentList:function(){},accountSettings:function(){},pushData:function(){}}}return function(){window.VWO=window.VWO||[];const getVisitorUuid=function(){if(window._vwo_acc_id>=1037725){return window.VWO&&window.VWO.get("visitor.id")}else{return window.VWO._&&window.VWO._.cookies&&window.VWO._.cookies.get("_vwo_uuid")}};var sendDebugLogsOld=function(expId,variationId,errorType,user_type,data){try{var errorPayload={f:argument["integrationName"]||"",a:window._vwo_acc_id,url:window.location.href,exp:expId,v:variationId,vwo_uuid:getVisitorUuid(),user_type:user_type};if(errorType=="initIntegrationCallback"){errorPayload["log_type"]="initIntegrationCallback";errorPayload["data"]=JSON.stringify(data||"")}else if(errorType=="timeout"){errorPayload["timeout"]=true}if(window.VWO._.customError){window.VWO._.customError({msg:"integration debug",url:window.location.href,lineno:"",colno:"",source:JSON.stringify(errorPayload)})}}catch(e){window.VWO._.customError&&window.VWO._.customError({msg:"integration debug failed",url:"",lineno:"",colno:"",source:""})}};var sendDebugLogs=function(expId,variationId,errorType,user_type){var eventName="vwo_debugLogs";var eventPayload={};try{eventPayload={intName:argument["integrationName"]||"",varId:variationId,expId:expId,type:errorType,vwo_uuid:getVisitorUuid(),user_type:user_type};if(window.VWO._.event){window.VWO._.event(eventName,eventPayload,{enableLogs:1})}}catch(e){eventPayload={msg:"integration event log failed",url:window.location.href};window.VWO._.event&&window.VWO._.event(eventName,eventPayload)}};const callbackFn=function(data){if(!data)return;var expId=data[1],variationId=data[2],repeated=data[0],singleCall=0,debug=0;var experimentList=argument.getExperimentList();var integrationName=argument["integrationName"]||"vwo";if(typeof argument.accountSettings==="function"){var accountSettings=argument.accountSettings();if(accountSettings){singleCall=accountSettings["singleCall"];debug=accountSettings["debug"]}}if(debug){sendDebugLogs(expId,variationId,"intCallTriggered",repeated)}if(singleCall&&(repeated==="vS"||repeated==="vSS")||firedCamp[expId]){return}window.expList=window.expList||{};var expList=window.expList[integrationName]=window.expList[integrationName]||[];if(expId&&variationId&&["VISUAL_AB","VISUAL","SPLIT_URL"].indexOf(_vwo_exp[expId].type)>-1){if(experimentList.indexOf(+expId)!==-1){firedCamp[expId]=variationId;var visitorUuid=getVisitorUuid();var pollInterval=100;var currentTime=0;var timeout=6e4;var user_type=_vwo_exp[expId].exec?"vwo-retry":"vwo-new";var interval=setInterval((function(){if(expList.indexOf(expId)!==-1){clearInterval(interval);return}currentTime=currentTime||performance.now();var toClearInterval=argument.pushData(expId,variationId,visitorUuid);if(debug&&toClearInterval){sendDebugLogsOld(expId,variationId,"",user_type);sendDebugLogs(expId,variationId,"intDataPushed",user_type)}var isTimeout=performance.now()-currentTime>=timeout;if(isTimeout&&debug){sendDebugLogsOld(expId,variationId,"timeout",user_type);sendDebugLogs(expId,variationId,"intTimeout",user_type)}if(toClearInterval||isTimeout){clearInterval(interval)}if(toClearInterval){window.expList[integrationName].push(expId)}}),pollInterval||100)}}};window.VWO.push(["onVariationApplied",callbackFn]);window.VWO.push(["onVariationShownSent",callbackFn])}}; var surveyDataCommonWrapper=function(argument){if(!argument){argument={getCampaignList:function(){return[]},surveyStatusChange:function(){},answerSubmitted:function(){}}}return function(){window.VWO=window.VWO||[];function getValuesFromAnswers(answers){var values=[];for(var i=0;i=timeout;if(toClearInterval||isTimeout){clearInterval(interval)}}),pollInterval)}}window.VWO.push(["onSurveyShown",function(data){commonSurveyCallback(data,argument.surveyStatusChange,"surveyShown")}]);window.VWO.push(["onSurveyCompleted",function(data){commonSurveyCallback(data,argument.surveyStatusChange,"surveyCompleted")}]);window.VWO.push(["onSurveyAnswerSubmitted",function(data){commonSurveyCallback(data,argument.answerSubmitted,"surveySubmitted")}])}}; (function(){var VWOOmniTemp={};window.VWOOmni=window.VWOOmni||{};for(var key in VWOOmniTemp)Object.prototype.hasOwnProperty.call(VWOOmniTemp,key)&&(window.VWOOmni[key]=VWOOmniTemp[key]);;})();(function(){window.VWO=window.VWO||[];var pollInterval=100;var _vis_data={};var intervalObj={};var analyticsTimerObj={};var experimentListObj={};window.VWO.push(["onVariationApplied",function(data){if(!data){return}var expId=data[1],variationId=data[2];if(expId&&variationId&&["VISUAL_AB","VISUAL","SPLIT_URL"].indexOf(window._vwo_exp[expId].type)>-1){}}])})();; ;var vD=VWO.data||{};VWO.data={content:{"fns":{"list":{"vn":1,"args":{"1":{}}}}},as:"r5.visualwebsiteoptimizer.com",dacdnUrl:"https://dev.visualwebsiteoptimizer.com",accountJSInfo:{"rp":30,"noSS":false,"pc":{"a":0,"t":0},"ts":1744513694}};for(var k in vD){VWO.data[k]=vD[k]};;var gcpfb=function(a,loadFunc,status,err,success){function vwoErr() {_vwo_err({message:"Google_Cdn failing for " + a + ". Trying Fallback..",code:"cloudcdnerr",status:status});} if(a.indexOf("/cdn/")!==-1){loadFunc(a.replace("cdn/",""),err,success); vwoErr(); return true;} else if(a.indexOf("/dcdn/")!==-1&&a.indexOf("evad.js") !== -1){loadFunc(a.replace("dcdn/",""),err,success); vwoErr(); return true;}};window.VWO=window.VWO || [];window.VWO._= window.VWO._ || {};window.VWO._.gcpfb=gcpfb;;var d={cookie:document.cookie,URL:document.URL,referrer:document.referrer};var w={VWO:{_:{}},location:{href:window.location.href,search:window.location.search},_vwoCc:window._vwoCc};;window._vwo_cdn="https://dev.visualwebsiteoptimizer.com/cdn/";window._vwo_apm_debug_cdn="https://dev.visualwebsiteoptimizer.com/cdn/";window.VWO._.useCdn=true;window.vwo_eT="br";window._VWO=window._VWO||{};window._VWO.fSeg={};window._VWO.dcdnUrl="/dcdn/settings.js";window.VWO.sTs=1744398897;window._VWO._vis_nc_lib=window._vwo_cdn+"edrv/nc-22652eff7f31b5ce957ea182f3b00d90br.js";var loadWorker=function(url){_vwo_code.load(url, { dSC: true, onloadCb: function(xhr,a){window._vwo_wt_l=true;if(xhr.status===200 ||xhr.status===304){var code="var window="+JSON.stringify(w)+",document="+JSON.stringify(d)+";window.document=document;"+xhr.responseText;var blob=new Blob([code||"throw new Error('code not found!');"],{type:"application/javascript"}),url=URL.createObjectURL(blob);window.mainThread={webWorker:new Worker(url)};window.vwoChannelFW=new MessageChannel();window.vwoChannelToW=new MessageChannel();window.mainThread.webWorker.postMessage({vwoChannelToW:vwoChannelToW.port1,vwoChannelFW:vwoChannelFW.port2},[vwoChannelToW.port1, vwoChannelFW.port2]);if(!window._vwo_mt_f)return window._vwo_wt_f=true;_vwo_code.addScript({text:window._vwo_mt_f});delete window._vwo_mt_f}else{if(gcpfb(a,loadWorker,xhr.status)){return;}_vwo_code.finish("&e=loading_failure:"+a)}}, onerrorCb: function(a){if(gcpfb(a,loadWorker)){return;}window._vwo_wt_l=true;_vwo_code.finish("&e=loading_failure:"+a);}})};loadWorker("https://dev.visualwebsiteoptimizer.com/cdn/edrv/worker-b31b97f8c2fb7582cde37c6681f5aeadbr.js");;var _vis_opt_file;var _vis_opt_lib;if(window.VWO._.allSettings.dataStore.previewExtraSettings!=undefined&&window.VWO._.allSettings.dataStore.previewExtraSettings.isSurveyPreviewMode){var surveyHash=window.VWO._.allSettings.dataStore.plugins.LIBINFO.SURVEY_DEBUG_EVENTS.HASH;var param1="evad.js?va=";var param2="&d=debugger_new";var param3="&sp=1&a=940895&sh="+surveyHash;_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?param1+"vanj"+param2:param1+"va_gq"+param2:param1+"edrv/va_gq-3c5e403756405f46fc0d721428dbc45cbr.js"+param2;_vis_opt_file=_vis_opt_file+param3;_vis_opt_lib="https://dev.visualwebsiteoptimizer.com/dcdn/"+_vis_opt_file}else if(window.VWO._.allSettings.dataStore.mode!=undefined&&window.VWO._.allSettings.dataStore.mode=="PREVIEW"){ var path1 = 'edrv/pd_'; var path2 = window.VWO._.allSettings.dataStore.plugins.LIBINFO.EVAD.HASH + ".js"; ;_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?path1+"vanj"+path2:path1+"va_gq"+path2:path1+"edrv/va_gq-3c5e403756405f46fc0d721428dbc45cbr.js"+path2;_vis_opt_lib="https://dev.visualwebsiteoptimizer.com/cdn/"+_vis_opt_file}else{_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?"edrv/vanj-944ef786aed805499ec94f3cef25ed99br.js":"edrv/va_gq-3c5e403756405f46fc0d721428dbc45cbr.js":"edrv/va_gq-3c5e403756405f46fc0d721428dbc45cbr.js"}window._vwo_library_timer=setTimeout((function(){vwoCode.removeLoaderAndOverlay&&vwoCode.removeLoaderAndOverlay();vwoCode.finish()}),vwoCode.library_tolerance&&typeof vwoCode.library_tolerance()!=="undefined"?vwoCode.library_tolerance():2500),_vis_opt_lib=typeof _vis_opt_lib=="undefined"?window._vwo_cdn+_vis_opt_file:_vis_opt_lib;var loadLib=function(url){_vwo_code.load(url, { dSC: true, onloadCb:function(xhr,a){window._vwo_mt_l=true;if(xhr.status===200 || xhr.status===304){if(!window._vwo_wt_f)return window._vwo_mt_f=xhr.responseText;_vwo_code.addScript({text:xhr.responseText});delete window._vwo_wt_f;}else{if(gcpfb(a,loadLib,xhr.status)){return;}_vwo_code.finish("&e=loading_failure:"+a);}}, onerrorCb: function(a){if(gcpfb(a,loadLib)){return;}window._vwo_mt_l=true;_vwo_code.finish("&e=loading_failure:"+a);}})};loadLib(_vis_opt_lib);VWO.load_co=function(u,opts){return window._vwo_code.load(u,opts);};;;}}catch(e){_vwo_code.finish();_vwo_code.removeLoaderAndOverlay&&_vwo_code.removeLoaderAndOverlay();_vwo_err(e);window.VWO.caE=1}})();
Stay Curious. Stay Connected.
MailNewsletters♡Donate Now
Sign up
*Password must be at least 8 characters and contain one uppercase letter, one lowercase letter, one number and one symbol.
Already have an account?
By submitting, you consent that you are at least 18 years of age and to receive information about MPR's or APMG entities' programs and offerings. The personally identifying information you provide will not be sold, shared, or used for purposes other than to communicate with you about MPR, APMG entities, and its sponsors. You may opt-out at any time clicking the unsubscribe link at the bottom of any email communication. View our Privacy Policy.
Sign in to your profile
Forgot Password?
New to MPR News?
Welcome back
to news
for you
Reset Password

Enter the username on file and we'll send you a code to reset your password.

Still require assistance or not sure what your User Name is?
Welcome back
to news
for you
Email Verification

A verification code has been emailed to

Still awaiting the code?
MPR News Staff

MPR News Special Report: Minnesota's water quality problem

Confluence of rivers
The confluence of the St. Croix and Mississippi rivers south of the Twin Cities - after the Minnesota River flows into the Mississippi - shows the contrast between Minnesota's river systems in ag-dominated areas and more natural areas.
Courtesy MPCA

Go Deeper.

Create an account or log in to save stories.

Log inCreate a free Account

Like this?

Thanks for liking this story! We have added it to a list of your favorite stories.

Show me!

Minnesota is rich in water, so we don't have a supply problem. But regulators say 40 percent of Minnesota's lakes and streams are polluted.

A team of MPR News reporters has been investigating the source of this pollution, and some ways to prevent it. There's agricultural runoff, leaking sewage, toxic algae and lead in the drinking water.

The MPR News water reporting team is Mark Zdechlik, Dan Gunderson, Dan Kraker, John Enger, Mark Steil, Lorna Benson and Elizabeth Dunbar, plus Clay Masters from Iowa Public Radio.

Volume Button
Volume
Now Listening To Livestream
MPR News logo
On Air
BBC World Service: The Arts Hour with Nikki Bedi