778 systems serving 4,630,253 people
  This drinking water quality report shows results of tests conducted by water utilities in Indiana, provided to the Environmental Working Group (EWG) by the Indiana Department of Environmental Management. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results from 45 states and the District of Columbia. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources in protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes drinking water quality for this state.

Water Utilities
Population Served
Detected Chemicals
Exceed health guidelines*
Exceed Legal Limits*
Unregulated chemicals detected
* 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.

  45 Contaminants Exceeding Health Based Limits

Contaminants detected in Indiana drinking water above health guidelines, according to an Environmental Working Group analysis of data obtained from state water authorities.

Number of Systems
At Any Level Above Health Limits At Any Level Above Health Limits
Total haloacetic acids (HAAs) 4,441,557 4,441,557 539 539
Total trihalomethanes (TTHMs) 4,484,201 4,216,921 570 433
Bromodichloromethane 3,181,027 3,181,027 223 223
Dibromochloromethane 3,063,262 2,995,826 199 192
Arsenic (total) 2,694,300 2,694,300 332 332
Chloroform 3,147,311 2,046,475 236 88
Di(2-ethylhexyl) phthalate 1,665,854 1,665,854 99 99
Bromoform 1,574,127 1,574,127 74 74
Atrazine 1,573,002 1,573,002 28 28
Benzo[a]pyrene 1,080,435 1,080,435 4 4

  Sources of Indiana Drinking Water Contaminants

The contaminants identified in Indiana drinking water come from a wide variety of sources, including agriculture, industry, water treatment plants, and polluted storm runoff from urban areas.

81 Total Contaminants Detected (2004 - 2009)
29 Agricultural Pollutants
(pesticides, fertilizer, factory farms)

Arsenic (total), Cyanide, Nitrate & nitrite, Nitrate, Nitrite, Selenium (total), Endrin, Lindane, Methoxychlor, Dalapon, Diquat, Endothall, Glyphosate, Simazine, Picloram, Dinoseb, Atrazine, Alachlor (Lasso), Heptachlor, Heptachlor epoxide, 2,4-D, 2,4,5-TP (Silvex), Bromomethane, 1,3-Dichloropropene, m-Dichlorobenzene, o-Dichlorobenzene, p-Dichlorobenzene, Monochlorobenzene (Chlorobenzene), Ethylbenzene

23 Sprawl and Urban Pollutants
(road runoff, lawn pesticides, human waste)

Arsenic (total), Cadmium (total), Copper, Cyanide, Lead (total), Mercury (total inorganic), Nitrate & nitrite, Nitrate, Nitrite, Antimony (total), Lindane, Dalapon, Glyphosate, Di(2-Ethylhexyl) adipate, 2,4-D, 2,4,5-TP (Silvex), MTBE, Benzo[a]pyrene, Xylenes (total), Dichloromethane (methylene chloride), p-Dichlorobenzene, Tetrachloroethylene, Benzene

54 Industrial Pollutants

Bromide, Arsenic (total), Barium (total), Cadmium (total), Chromium (total), Cyanide, Lead (total), Mercury (total inorganic), Nitrate & nitrite, Nitrate, Nitrite, Selenium (total), Antimony (total), Beryllium (total), Thallium (total), Lindane, Di(2-Ethylhexyl) adipate, Di(2-ethylhexyl) phthalate, Hexachlorocyclopentadiene, Chloromethane, Chloroethane, MTBE, Hexachlorobenzene (HCB), Pentachlorophenol, 1,2,4-Trichlorobenzene, cis-1,2-Dichloroethylene, Total polychlorinated biphenyls (PCBs), Dibromomethane, Xylenes (total), Dichloromethane (methylene chloride), o-Chlorotoluene, p-Chlorotoluene, m-Dichlorobenzene, p-Dichlorobenzene, Vinyl chloride, 1,1-Dichloroethylene, 1,1-Dichloroethane, trans-1,2-Dichloroethylene, 1,2-Dichloroethane, 1,1,1-Trichloroethane, Carbon tetrachloride, Trichloroethylene, 1,1,2-Trichloroethane, Tetrachloroethylene, Monochlorobenzene (Chlorobenzene), Benzene, Toluene, Ethylbenzene, Styrene, Alpha particle activity (excl radon and uranium), Combined Radium (-226 & -228), Radium-226, Radium-228, Gross beta particle activity (pCi/L)

15 Water Treatment and Distribution Byproducts
(pipes and fixtures, treatment chemicals and byproducts)

Total trihalomethanes (TTHMs), Total haloacetic acids (HAAs), Chloroform, Bromodichloromethane, Dibromochloromethane, Bromoform, Di(2-ethylhexyl) phthalate, Cadmium (total), Chloromethane, Bromate, Vinyl chloride, Dibromomethane, Benzo[a]pyrene, Chloroethane, m-Dichlorobenzene

18 Naturally Occurring
(naturally present but increased for lands denuded by sprawl, agriculture, or industrial development)

Nitrate, Copper, Nitrate & nitrite, Barium (total), Lead (total), Arsenic (total), Radium-228, Radium-226, Alpha particle activity (excl radon and uranium), Combined Radium (-226 & -228), Gross beta particle activity (pCi/L), Chromium (total), Selenium (total), Nitrite, Bromide, Mercury (total inorganic), Chloromethane, Cyanide

12 Unregulated Contaminants
EPA has not established a maximum legal limit in tapwater for these contaminants

Bromide, Lead (total), Chloromethane, Bromomethane, Chloroethane, MTBE, Dibromomethane, 1,3-Dichloropropene, o-Chlorotoluene, p-Chlorotoluene, m-Dichlorobenzene, 1,1-Dichloroethane

  Testing Summary for Indiana

The federal government has set standards for some of the pollutants found in tap water supplies.

Contaminants reported as tested by water suppliers in Indiana 113
  Contaminants tested due to federal law: 79
  Contaminants tested in addition to those required by federal law: 34
  Violation Summary for Indiana

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Indiana since 2004

Violation Type Number of Violations
Failure to monitor regularly 2,883
Failure to monitor, Routine Major (Coliform bacteria) 494
Over maximum contaminant level, Average 252
Inadequate reporting of information to the public 230
Maximum contaminant level, Monthly (Coliform bacteria) 225
Monitoring and Reporting Disinfection Byproduct Rule 203
Failure to monitor, Routine Minor (Coliform bacteria) 76
Failure to report information to the public or state agency in the Consumer Confidence Report 72
Follow-up and Routine Tap Sampling 50
Failure to monitor, Repeat Major (Coliform bacteria) 25
Initial Tap Sampling for Lead and Copper 19
Excess Turbidity at 0.3 NTU 17
Treatment Technique Precursor Removal 15
Over maximum contaminant level, Single Sample 14
Maximum contaminant level, Acute (Coliform bacteria) 9
Failure to monitor, Repeat Minor (Coliform bacteria) 8
Filter Turbidity Reporting 7
Excess Turbidity at 1 NTU 4
Treatment Technique (Surface Water Treatment Rule) 4
Public Notification Violation for National Primary Drinking Water Regulations 1
Initial Water Quality Parameter Monitoring and Reporting 1
Initial, Follow-up, or Routine Source Water Treatment Monitoring and Reporting 1
Public Education 1

Sources : EWG (Environmental Working Group)