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Plumbing corrosion product causing stomach issues at high levels. Below are US cities ranked by their measured Copper levels compared to EPA limits. Higher percentages indicate greater concern.
Vulnerable Populations: People with Wilson's disease (genetic copper accumulation) must strictly limit copper exposure.
Ranked by percentage of EPA limit. Click any city for full water quality report.
| Rank | City | State | Level | EPA Limit | % of Limit | Status | Population |
|---|---|---|---|---|---|---|---|
| #1 | Arvada | Colorado | 0.784 ppm | 1.300 ppm | 60.3% | Elevated | 122,991 |
| #2 | Norwood | Massachusetts | 0.781 ppm | 1.300 ppm | 60.0% | Elevated | 35,779 |
| #3 | Lake Charles | Louisiana | 0.769 ppm | 1.300 ppm | 59.2% | Elevated | 89,012 |
| #4 | Fort Dodge | Iowa | 0.766 ppm | 1.300 ppm | 58.9% | Elevated | 21,031 |
| #5 | Margate | Florida | 0.764 ppm | 1.300 ppm | 58.8% | Elevated | 54,305 |
| #6 | Bardstown | Kentucky | 0.760 ppm | 1.300 ppm | 58.5% | Elevated | 17,535 |
| #7 | Deltona | Florida | 0.760 ppm | 1.300 ppm | 58.4% | Elevated | 95,468 |
| #8 | Hagerstown | Maryland | 0.759 ppm | 1.300 ppm | 58.4% | Elevated | 42,034 |
| #9 | Kaneohe | Hawaii | 0.757 ppm | 1.300 ppm | 58.2% | Elevated | 32,542 |
| #10 | Prescott | Arizona | 0.751 ppm | 1.300 ppm | 57.8% | Elevated | 46,399 |
| #11 | North Miami | Florida | 0.752 ppm | 1.300 ppm | 57.8% | Elevated | 65,145 |
| #12 | Bloomington | Illinois | 0.750 ppm | 1.300 ppm | 57.7% | Elevated | 80,006 |
| #13 | Carrollton | Georgia | 0.748 ppm | 1.300 ppm | 57.5% | Elevated | 26,337 |
| #14 | Mount Prospect | Illinois | 0.747 ppm | 1.300 ppm | 57.4% | Elevated | 57,546 |
| #15 | Harvey | Louisiana | 0.740 ppm | 1.300 ppm | 56.9% | Elevated | 17,430 |
| #16 | Woodland | California | 0.739 ppm | 1.300 ppm | 56.9% | Elevated | 65,033 |
| #17 | Alexandria | Louisiana | 0.731 ppm | 1.300 ppm | 56.3% | Elevated | 46,654 |
| #18 | Newton | Massachusetts | 0.731 ppm | 1.300 ppm | 56.2% | Elevated | 83,751 |
| #19 | Waterloo | Iowa | 0.724 ppm | 1.300 ppm | 55.7% | Elevated | 71,244 |
| #20 | Savannah | Georgia | 0.722 ppm | 1.300 ppm | 55.6% | Elevated | 142,861 |
| #21 | Scottsdale | Arizona | 0.709 ppm | 1.300 ppm | 54.5% | Elevated | 244,541 |
| #22 | San Bernardino | California | 0.704 ppm | 1.300 ppm | 54.1% | Elevated | 221,094 |
| #23 | Watsonville | California | 0.701 ppm | 1.300 ppm | 53.9% | Elevated | 49,989 |
| #24 | Aurora | Colorado | 0.696 ppm | 1.300 ppm | 53.6% | Elevated | 386,506 |
| #25 | Seaford | Delaware | 0.696 ppm | 1.300 ppm | 53.5% | Elevated | 10,965 |
| #26 | Marana | Arizona | 0.694 ppm | 1.300 ppm | 53.4% | Elevated | 47,264 |
| #27 | Hoover | Alabama | 0.690 ppm | 1.300 ppm | 53.0% | Elevated | 90,476 |
| #28 | Windsor | Colorado | 0.685 ppm | 1.300 ppm | 52.7% | Elevated | 30,201 |
| #29 | Garden Grove | California | 0.678 ppm | 1.300 ppm | 52.2% | Elevated | 176,920 |
| #30 | Plantation | Florida | 0.678 ppm | 1.300 ppm | 52.1% | Elevated | 92,578 |
| #31 | Evansville | Indiana | 0.672 ppm | 1.300 ppm | 51.7% | Elevated | 118,111 |
| #32 | Bellflower | California | 0.671 ppm | 1.300 ppm | 51.6% | Elevated | 82,227 |
| #33 | Madisonville | Kentucky | 0.671 ppm | 1.300 ppm | 51.6% | Elevated | 20,684 |
| #34 | Carlsbad | California | 0.668 ppm | 1.300 ppm | 51.4% | Elevated | 112,923 |
| #35 | Natchitoches | Louisiana | 0.667 ppm | 1.300 ppm | 51.3% | Elevated | 14,022 |
| #36 | Shelbyville | Kentucky | 0.667 ppm | 1.300 ppm | 51.3% | Elevated | 21,365 |
| #37 | Lynn | Massachusetts | 0.649 ppm | 1.300 ppm | 50.0% | Within Limit | 99,997 |
| #38 | Encinitas | California | 0.646 ppm | 1.300 ppm | 49.7% | Within Limit | 66,157 |
| #39 | Safety Harbor | Florida | 0.645 ppm | 1.300 ppm | 49.7% | Within Limit | 12,419 |
| #40 | Hialeah | Florida | 0.645 ppm | 1.300 ppm | 49.6% | Within Limit | 225,913 |
| #41 | Santa Ana | California | 0.645 ppm | 1.300 ppm | 49.6% | Within Limit | 310,209 |
| #42 | Pooler | Georgia | 0.643 ppm | 1.300 ppm | 49.5% | Within Limit | 23,913 |
| #43 | Normal | Illinois | 0.629 ppm | 1.300 ppm | 48.4% | Within Limit | 56,574 |
| #44 | Goodyear | Arizona | 0.626 ppm | 1.300 ppm | 48.1% | Within Limit | 88,803 |
| #45 | Largo | Florida | 0.623 ppm | 1.300 ppm | 47.9% | Within Limit | 80,565 |
| #46 | Michigan City | Indiana | 0.623 ppm | 1.300 ppm | 47.9% | Within Limit | 28,299 |
| #47 | Sugar Hill | Georgia | 0.616 ppm | 1.300 ppm | 47.4% | Within Limit | 29,449 |
| #48 | Antioch | California | 0.607 ppm | 1.300 ppm | 46.7% | Within Limit | 120,083 |
| #49 | Prescott Valley | Arizona | 0.604 ppm | 1.300 ppm | 46.4% | Within Limit | 44,368 |
| #50 | Durango | Colorado | 0.602 ppm | 1.300 ppm | 46.3% | Within Limit | 16,593 |
| #51 | Meridian | Idaho | 0.600 ppm | 1.300 ppm | 46.1% | Within Limit | 122,493 |
| #52 | Sulphur | Louisiana | 0.590 ppm | 1.300 ppm | 45.4% | Within Limit | 15,987 |
| #53 | Chicopee | Massachusetts | 0.589 ppm | 1.300 ppm | 45.3% | Within Limit | 59,857 |
| #54 | Miramar | Florida | 0.586 ppm | 1.300 ppm | 45.1% | Within Limit | 136,668 |
| #55 | Peachtree Corners | Georgia | 0.581 ppm | 1.300 ppm | 44.7% | Within Limit | 42,595 |
| #56 | Quincy | Massachusetts | 0.581 ppm | 1.300 ppm | 44.7% | Within Limit | 101,993 |
| #57 | Dalton | Georgia | 0.581 ppm | 1.300 ppm | 44.7% | Within Limit | 33,119 |
| #58 | Florence | Kentucky | 0.578 ppm | 1.300 ppm | 44.5% | Within Limit | 37,377 |
| #59 | Aurora | Illinois | 0.578 ppm | 1.300 ppm | 44.5% | Within Limit | 176,880 |
| #60 | Englewood | Colorado | 0.570 ppm | 1.300 ppm | 43.8% | Within Limit | 37,600 |
| #61 | El Mirage | Arizona | 0.570 ppm | 1.300 ppm | 43.8% | Within Limit | 32,910 |
| #62 | Thibodaux | Louisiana | 0.555 ppm | 1.300 ppm | 42.7% | Within Limit | 19,121 |
| #63 | Germantown | Maryland | 0.552 ppm | 1.300 ppm | 42.5% | Within Limit | 95,954 |
| #64 | Cedar Rapids | Iowa | 0.546 ppm | 1.300 ppm | 42.0% | Within Limit | 137,324 |
| #65 | Lewiston | Idaho | 0.542 ppm | 1.300 ppm | 41.7% | Within Limit | 36,802 |
| #66 | Tampa | Florida | 0.535 ppm | 1.300 ppm | 41.2% | Within Limit | 388,544 |
| #67 | Pinellas Park | Florida | 0.534 ppm | 1.300 ppm | 41.1% | Within Limit | 50,142 |
| #68 | Wesley Chapel | Florida | 0.532 ppm | 1.300 ppm | 40.9% | Within Limit | 66,598 |
| #69 | Plainfield | Illinois | 0.521 ppm | 1.300 ppm | 40.1% | Within Limit | 41,841 |
| #70 | Cabot | Arkansas | 0.518 ppm | 1.300 ppm | 39.8% | Within Limit | 24,877 |
| #71 | Woburn | Massachusetts | 0.517 ppm | 1.300 ppm | 39.8% | Within Limit | 46,245 |
| #72 | South Portland | Maine | 0.515 ppm | 1.300 ppm | 39.6% | Within Limit | 24,490 |
| #73 | Fountain | Colorado | 0.507 ppm | 1.300 ppm | 39.0% | Within Limit | 34,998 |
| #74 | Valdosta | Georgia | 0.499 ppm | 1.300 ppm | 38.4% | Within Limit | 53,099 |
| #75 | Palm Bay | Florida | 0.495 ppm | 1.300 ppm | 38.1% | Within Limit | 124,351 |
| #76 | Blackfoot | Idaho | 0.495 ppm | 1.300 ppm | 38.0% | Within Limit | 10,311 |
| #77 | Skokie | Illinois | 0.483 ppm | 1.300 ppm | 37.2% | Within Limit | 70,466 |
| #78 | Lawrence | Kansas | 0.479 ppm | 1.300 ppm | 36.9% | Within Limit | 97,311 |
| #79 | Redlands | California | 0.477 ppm | 1.300 ppm | 36.7% | Within Limit | 68,132 |
| #80 | Topeka | Kansas | 0.475 ppm | 1.300 ppm | 36.6% | Within Limit | 123,414 |
| #81 | St. Petersburg | Florida | 0.475 ppm | 1.300 ppm | 36.6% | Within Limit | 255,045 |
| #82 | New Iberia | Louisiana | 0.474 ppm | 1.300 ppm | 36.5% | Within Limit | 30,053 |
| #83 | Alameda | California | 0.473 ppm | 1.300 ppm | 36.4% | Within Limit | 84,394 |
| #84 | Brentwood | California | 0.472 ppm | 1.300 ppm | 36.3% | Within Limit | 62,290 |
| #85 | South Laurel | Maryland | 0.471 ppm | 1.300 ppm | 36.3% | Within Limit | 30,059 |
| #86 | Bessemer | Alabama | 0.470 ppm | 1.300 ppm | 36.1% | Within Limit | 26,743 |
| #87 | Enfield | Connecticut | 0.470 ppm | 1.300 ppm | 36.1% | Within Limit | 38,265 |
| #88 | Pico Rivera | California | 0.468 ppm | 1.300 ppm | 36.0% | Within Limit | 62,759 |
| #89 | Great Bend | Kansas | 0.466 ppm | 1.300 ppm | 35.8% | Within Limit | 20,211 |
| #90 | Bradenton | Florida | 0.465 ppm | 1.300 ppm | 35.8% | Within Limit | 54,398 |
| #91 | Cerritos | California | 0.466 ppm | 1.300 ppm | 35.8% | Within Limit | 46,952 |
| #92 | Lake Forest | California | 0.466 ppm | 1.300 ppm | 35.8% | Within Limit | 86,093 |
| #93 | Perris | California | 0.463 ppm | 1.300 ppm | 35.6% | Within Limit | 80,899 |
| #94 | Nogales | Arizona | 0.463 ppm | 1.300 ppm | 35.6% | Within Limit | 22,856 |
| #95 | Alhambra | California | 0.457 ppm | 1.300 ppm | 35.1% | Within Limit | 82,888 |
| #96 | Rockford | Illinois | 0.456 ppm | 1.300 ppm | 35.1% | Within Limit | 144,954 |
| #97 | Orange | California | 0.456 ppm | 1.300 ppm | 35.1% | Within Limit | 135,695 |
| #98 | Hammond | Indiana | 0.457 ppm | 1.300 ppm | 35.1% | Within Limit | 76,263 |
| #99 | Palatine | Illinois | 0.456 ppm | 1.300 ppm | 35.1% | Within Limit | 66,114 |
| #100 | Palm Springs | California | 0.453 ppm | 1.300 ppm | 34.8% | Within Limit | 51,897 |
Very effective for copper removal.
Water softeners can reduce copper.
Copper-zinc alloy media effective for copper.
Blue-green staining indicates high copper levels from corroding pipes. The staining itself is not harmful but indicates you should test your water.
Yes. Running cold water for 30 seconds to 2 minutes flushes standing water that may have accumulated copper from pipes.
Copper is an essential nutrient in small amounts. The concern is levels high enough to cause GI symptoms or, with long-term exposure, liver damage.