Highest dischargeBonita Peak

Mining District:15,264,000

Zero containmenthighest discharge

Ore Knob Mine1,244,160

Ore Knob MineAshe County, N.C.

Wash. County LeadOld Mines, Mo.

Tar CreekOttawa County, Okla.

Ormet Corp.Hannibal, Ohio

Barite Hill/GoldfieldsMcCormick, S.C.

Nelson Tunnel/CommodoreCreede, Colo.

Lava CapNevada City, Calif.

Carpenter Snow CreekNeihart, Mont.

Barker HughesvilleMonarch, Mont.

Pike Hill CopperCorinth, Vt.

Sulpher Bank MercuryClearlake Oaks, Calif.

Upper Tenmile CreekHelena, Mont.

Ely CopperVershire, Vt.

Wurtsboro Lead MineMamakating, N.Y.

New Idria Mercury MineIdria, Calif.

Iron King/HumboldtDewey-Humboldt, Ariz.

Klau/Buena VistaPaso Robles, Calif.

Basin Mining AreaBasin, Mont.

Captain Jack Mill*Ward, Colo.

Standard MineGunnison Natl. Forest, Colo.

Formosa MineRiddle, Ore.

Argonaut MineJackson, Calif.

Madison County MinesFredericktown, Mo.

Blue Ledge MineRogue River-Siskiyou, Calif.

259,200

388,800

371,520

180,000

154,656

144,000

67,680

54,000

57,600

36,000

28,944

28,800

14,400

28,800

11,520

7,200

6,336

4,320

GALLONS PER DAY DISCHARGEMine sites with zero containment, active treatment or storage of contaminated water

288-10,000 gallons10,000-100,000100,000-200,000200,000-400,000

More than 400,000

0% 100%90%40%

PERCENTAGE OF POLLUTED WATER DISCHARGE TREATED OR CONTAINED AVERAGE DAILY DISCHARGE VOLUME

N.C.

N.Y.

OR

S.C.

TN

MO

OK

VAVA

S.D.

OH

COCA

MT VT

AZ N.M.

ID

IN

WA

ME

1.06 million

1 million

1 million

455,040

134,640

*Had a temporary treatment system installed Dec. 2018.

*

1.24 million