The Power of Information

National Drinking Water Database

West Bend Waterworks Utilities - West Bend, WI

Serves 28,943 people


Copper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
41 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
2 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
105 days
Tests ConductedNumber of individual tests done for this contaminant
301 tests

Testing Summary

Health Limit
Legal Limit

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
CopperCopper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits.294.59 ppb
1580 ppb
300 ppb
1000 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Copper

Health Based Limits for Copper

California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.300 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 1000 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.1300 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.1300 ppb

Testing Results

Testing DateAverage
Samples taken that dayNumber of Non-DetectsRange of Results
2007-11-0552.3 ppb1052.3 ppb
2007-10-2965.8 ppb1065.8 ppb
2007-10-15477 ppb10477 ppb
2007-10-12124.4 ppb2045.8 to 203 ppb
2007-10-11131 ppb10131 ppb
2007-10-10126.4 ppb3076.2 to 199 ppb
2007-10-09228.4 ppb5091 to 345 ppb
2007-10-04104 ppb10104 ppb
2007-10-03400 ppb40177 to 526 ppb
2007-10-01528 ppb10528 ppb
2007-09-28108 ppb10108 ppb
2007-09-2754.1 ppb1054.1 ppb
2007-09-26526.27 ppb3067.8 to 1250 ppb
2007-09-25209.7 ppb3067.9 to 483 ppb
2007-09-24165.48 ppb4099.9 to 235 ppb
2007-09-20459.8 ppb50195 to 1090 ppb
2007-09-19347.37 ppb9072.3 to 1040 ppb
2007-09-18269.11 ppb14017.1 to 974 ppb
2007-05-23150 ppb10150 ppb
2007-05-10108 ppb10108 ppb
2007-05-0677.4 ppb1077.4 ppb
2007-05-0578.2 ppb1078.2 ppb
2007-05-04444 ppb10444 ppb
2007-05-03105 ppb10105 ppb
2007-05-02435.47 ppb3098.4 to 702 ppb
2007-04-27162 ppb10162 ppb
2007-04-26131 ppb10131 ppb
2007-04-2562.4 ppb1062.4 ppb
2007-04-24129.78 ppb4010.1 to 278 ppb
2007-04-16395.8 ppb2040.6 to 751 ppb
2007-04-13542 ppb20435 to 649 ppb
2007-04-12240.1 ppb7040.5 to 657 ppb
2007-04-11305 ppb10305 ppb
2007-04-10383.33 ppb30145 to 646 ppb
2007-03-27431.67 ppb30284 to 514 ppb
2007-03-26574.33 ppb3039 to 1070 ppb
2007-03-23392.5 ppb20304 to 481 ppb
2007-03-22322 ppb10322 ppb
2007-03-21166 ppb10166 ppb
2007-03-20375 ppb10375 ppb
2007-03-15263.5 ppb20241 to 286 ppb
2007-03-14136.37 ppb12016.1 to 274 ppb
2007-03-13594.8 ppb50100 to 1150 ppb
2006-12-041580 ppb101580 ppb
2006-11-16291 ppb10291 ppb
2006-10-18107 ppb10107 ppb
2006-10-1257.8 ppb1057.8 ppb
2006-10-1085.8 ppb1085.8 ppb
2006-10-09299.5 ppb20237 to 362 ppb
2006-10-08111 ppb10111 ppb
2006-10-06156.5 ppb3082.1 to 304 ppb
2006-10-05461.6 ppb4083.4 to 807 ppb
2006-10-0343 ppb1043 ppb
2006-10-02194 ppb20150 to 238 ppb
2006-09-28762.67 ppb30299 to 1110 ppb
2006-09-2740.2 ppb1040.2 ppb
2006-09-2572.6 ppb2010.2 to 135 ppb
2006-09-22140 ppb10140 ppb
2006-09-21279.6 ppb5020.3 to 827 ppb
2006-09-20455.55 ppb6026.3 to 1060 ppb
2006-09-181220 ppb101220 ppb
2006-09-15430.55 ppb4045.2 to 754 ppb
2006-09-14368.3 ppb1204.46 to 1010 ppb
2006-09-13238.13 ppb7055.9 to 974 ppb
2006-05-22397.5 ppb20377 to 418 ppb
2006-05-19146 ppb20115 to 177 ppb
2006-05-18173 ppb10173 ppb
2006-05-15224 ppb10224 ppb
2006-05-11151.73 ppb3044.2 to 214 ppb
2006-05-10665.25 ppb40196 to 1440 ppb
2006-05-05473.67 ppb30135 to 1110 ppb
2006-05-04198.81 ppb7033.7 to 408 ppb
2006-05-03191.04 ppb7038.8 to 350 ppb
2005-06-10333.25 ppb40109 to 594 ppb
2005-06-0778.3 ppb1078.3 ppb
2005-06-03580.5 ppb20428 to 733 ppb
2005-06-02610.25 ppb40236 to 1360 ppb
2005-06-01257 ppb10257 ppb
2005-05-27226 ppb10226 ppb
2005-05-26274.6 ppb2049.2 to 500 ppb
2005-05-25212.5 ppb20137 to 288 ppb
2005-05-24256 ppb20205 to 307 ppb
2005-05-19106 ppb10106 ppb
2005-05-1291.5 ppb1091.5 ppb
2005-05-11291.6 ppb5075.2 to 600 ppb
2005-05-1069.05 ppb4038.7 to 139 ppb
2004-05-2574.6 ppb1074.6 ppb
2004-05-21337 ppb10337 ppb
2004-05-14143.83 ppb4064.4 to 372 ppb
2004-05-1377.9 ppb1077.9 ppb
2004-04-29410.5 ppb20197 to 624 ppb
2004-04-28111 ppb10111 ppb
2004-04-23406 ppb20231 to 581 ppb
2004-04-20266 ppb10266 ppb
2004-04-16505 ppb20459 to 551 ppb
2004-04-15215.15 ppb4072.6 to 400 ppb
2004-04-1498.4 ppb5047.4 to 202 ppb
2004-04-09752 ppb10752 ppb
2004-04-08815.5 ppb20471 to 1160 ppb
2004-04-07455.56 ppb9021 to 1010 ppb
2004-04-06535 ppb10535 ppb
2004-04-02315 ppb10315 ppb
2004-04-01321.17 ppb10025.9 to 705 ppb
2004-03-31217.3 ppb9010.9 to 798 ppb
2004-03-3090.27 ppb3031.7 to 170 ppb