Jump to main content or area navigation.

Contact Us

Water: Nutrients

Indiana Criteria Development Progress

Indiana State 

This page provides information about the progress Indiana has made towards the development of numeric criteria and shows what statewide and site-specific criteria are currently in effect.

Note: The information on the tabs below reflects the information available on EPA’s Water Quality Standards Repository. The criteria presented here will be updated as new water quality standards documents are posted to the Repository.


Numeric Criteria Development

The information presented below gives a summary of state progress towards the development of numeric criteria. The information comes from EPA’s “State Adoption of Numeric Nutrient Standards (1998-2008)” report, current water quality standards, program activity measures, and nutrient criteria development plans. Links to the Indiana’s Nutrient Criteria Plan and state water quality standards are also provided.


Existing Numeric Criteria

Waterbody Type N P Chl-a Clarity
Lakes & Reservoirs   W    
Rivers & Streams        
Estuaries N ⁄ A N ⁄ A N ⁄ A N ⁄ A
Wetlands        

S = Statewide    W = For selected waterbody    N ⁄ A=Not Applicable

Note: See Statewide Criteria and Site-specific Criteria tabs for more information.

Top of Page


You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

Plans:

WQS: Indiana Water Quality Standards
Indiana Department of Environmental Management: Rules, Statutes and Policies Exit EPA Disclaimer

Top of Page


Milestone Information

Milestone information updated May 2012.


Milestone
Rivers and Streams Lakes and Reservoirs Estuaries and Coastal Waters
TN TP TN TP TN TP
Planning for criteria development  Complete  Complete  Complete  Complete  Not applicable  Not applicable
Collection of information and data  Complete  Complete  No date provided  Complete  Not applicable  Not applicable
Analysis of information and data  No date provided  10/1/2011 - Complete  No date provided  Complete  Not applicable  Not applicable
Proposal of criteria  No date provided  12/1/2013  No date provided  6/1/2012  Not applicable  Not applicable
Adoption of criteria (EPA-Approved)  No date provided  12/1/2014  No date provided  12/1/2012  Not applicable  Not applicable

TN: Total Nitrogen; TP: Total Phosphorus

Note: Indiana is not ready to propose any dates for adoption of total nitrogen because of implementation issues.

Top of Page

Statewide Criteria

The information on this tab shows EPA-approved nutrient criteria for Indiana’s waterbodies. The language presented below comes directly from state water quality standards and applies to all waterbodies within the state (unless a waterbody type or designated use is noted). Criteria applicable to specific waterbodies within the state can be found on the “Site-specific Criteria” tab. For more information, refer to the Indiana water quality standards.

The following information reflects Indiana’s 1997 water quality standards posted to the Water Quality Standards Repository as of November 2010.

Rule 1. Water Quality Standards Applicable to All State Waters Except Waters of the State Within the Great Lakes System

327 IAC 2-1-6 Minimum surface water quality standards

Sec. 6. (a) The following are minimum water quality conditions:

(1) All waters at all times and at all places, including the mixing zone, shall meet the minimum conditions of being free from substances, materials, floating debris, oil, or scum attributable to municipal, industrial, agricultural, and other land use practices, or other discharges:

(B) that are in amounts sufficient to be unsightly or deleterious;

(C) that produce color, visible oil sheen, odor, or other conditions in such degree as to create a nuisance;

(E) which are in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such degree as to create a nuisance, be unsightly, or otherwise impair the designated uses.

Table 1
Water Quality Criteria for Specific Substances

AAC (Maximum) CCC (4-Day Average)
Outside of Mixing Zone Point of Water Intake
Substances Aquatic Life (CAC) Human Health Human Health
Nitrate-N + Nitrite-N (mg/L)   10 (D*)
Nitrite-N (mg/L)   1.0 (D*)  

* D derived from drinking water standards, equal to or less than threshold toxicity.

Rule 1.5. Water Quality Standards Applicable to All State Waters Within the Great Lakes System

327 IAC 2-1.5-8 Minimum surface water quality criteria

Sec. 8. (a) All surface water quality criteria in this section, except those provided in subsection (b)(1), will cease to be applicable when the stream flows are less than the applicable stream design flow for the particular criterion as determined under 327 IAC 5-2-11.4.

(b) The following are minimum water quality conditions:

(1) All waters within the Great Lakes system at all times and at all places, including waters within the mixing zone, shall meet the minimum conditions of being free from substances, materials, floating debris, oil, or scum attributable to municipal, industrial, agricultural, and other land use practices, or other discharges that do any of the following:

(B) Are in amounts sufficient to be unsightly or deleterious.

(C) Produce color, visible oil sheen, odor, or other conditions in such degree as to create a nuisance.

(D) Are in concentrations or combinations that will cause or contribute to the growth of aquatic plants or algae to such degree as to create a nuisance, be unsightly, or otherwise impair the designated uses.

(c) This subsection establishes minimum water quality criteria for aquatic life. In addition to the criteria in subsection (b), this subsection ensures conditions necessary for the maintenance of a well-balanced aquatic community. The following conditions are applicable at any point in the waters outside of the applicable mixing zone, as determined in accordance with section 7 of this rule and 327 IAC 5-2-11.4(b):

(1) There shall be no substances which impart unpalatable flavor to food fish or result in offensive odors in the vicinity of the water.

(f) This subsection establishes surface water quality for public water supplies. In addition to subsection (b), the following standards are established to protect the surface water quality at the point at which water is withdrawn for treatment for public supply:

(5) The combined concentration of nitrate-N and nitrite-N shall not exceed ten (10) milligrams per liter, and the concentration of nitrite-N shall not exceed one (1) milligram per liter.

Site-specific Criteria

The information on this tab shows EPA-approved site-specific nutrient criteria for Indiana’s waterbodies. Criteria on this page apply only to the waterbodies listed below. Criteria applicable to all waterbodies within the state are found on the “Statewide Criteria” tab. For more information, refer to the Indiana water quality standards.

The following information reflects Indiana’s 1997 water quality standards posted to the Water Quality Standards Repository as of November 2010.

Rule 1.5. Water Quality Standards Applicable to All State Waters Within the Great Lakes System

327 IAC 2-1.5-8 Minimum surface water quality criteria

(j) Additional requirements for the open waters of Lake Michigan are as follows:

(1) In addition to complying with all other applicable subsections, open waters in Lake Michigan shall meet the following criteria:

Table 8-9
Additional Criteria for Lake Michigan

Parameters    Criteria  
Total Phosphorus See 327 IAC 5-10-2

(2) During each triennial review of the water quality standards, prior to preliminary adoption of revised rules, the department shall prepare a report for the board on the monitoring data for the constituents in the following table (Table 8-10), as measured at the drinking water intakes in Lake Michigan. If these data indicate that the levels of the constituents are either increasing or exceed the levels in the table, the report shall provide available information on the known and potential causes of the increased levels of these parameters, the known and potential impacts on aquatic life, wildlife, and human health, and any recommended revisions of the criteria.

Table 8-10

Parameters   Levels
Total phosphorus  
    Monthly average 0.03 mg/L  
    Daily maximum   0.04 mg/L  


Jump to main content.