Rules, Laws, Policies and Guidance

The Division of Drinking and Ground Waters (DDAGW) rules were promulgated under U.S. EPA's Safe Drinking Water Act (SDWA). Rules for Ohio public drinking water systems are adopted under Ohio Revised Code (ORC) Section 6109, and rules for Underground Injection Control, under ORC 6111.043. Ohio Administrative Code (OAC) rules administered by DDAGW are located on this page.  More information about DDAGW's rule-making process is available under the "DDAGW Rules Process" section below.

Questions? Email Susan Baughman or call (614) 644-2752.

Electronic versions of policies and guidance may be viewed by clicking on the appropriate tab. Join a rules electronic mailing list to stay informed about current rule-making and opportunities to provide comment during the process.

Announcements

March 27, 2014: DDAGW seeks comments on proposed amendments to primary drinking water standard definitions, including the definition of a public water system and to the water source designation rule.  The public notice advertising the comment period and an upcoming public hearing, as well as the proposed amendments can be viewed by clicking here.  Questions and comments should be forwarded to Susan Baughman at (614) 644-2752 or by email at DDAGW_RULECOMMENTS@epa.ohio.gov with the subject line, "Proposed amendments to PWS Definition and source designation," no later than May 1, 2014.

March 21, 2014:  DDAGW guidance document number ENG-01-003, Guideline for Clarifier and Granular Media Filter Ratings at Surface Water Treatment Plants has been issued with revisions.  This guidance document and others can be viewed by clicking here.

March 17, 2014:  DDAGW seeks comments on proposed amendments to the license to operate (a public water system) rules.  The public notice advertising the comment period and an upcoming public hearing, as well as the proposed amendments can be viewed by clicking here.  Questions and comments should be forwarded to Julie Spangler at (614) 644-2752 or by email at DDAGW_RULECOMMENTS@epa.ohio.gov with the subject line "Proposed LTO amendments, 2014" no later than April 21, 2014.

DDAGW's effective rules are available on this web page.  To view the rules, click here.

DDAGW's Rule-making Process

The Division of Drinking and Ground Waters (DDAGW) rules were promulgated under U.S. EPA's Safe Drinking Water Act (SDWA). Rules for Ohio public drinking water systems are adopted under Ohio Revised Code (ORC) Section 6109, and rules for Underground Injection Control, under ORC 6111.043. Ohio Administrative Code (OAC) rules administered by DDAGW are located on this page. 

Proposing new rules and amendments to existing rules is a regular activity conducted by Ohio EPA in response to laws passed by the General Assembly and federal rule requirements. The Agency is also required by state law to review its rules at least once every five years to ensure their continued need and relevance. During the Ohio rule-making process, rules are in one of four phases: early stakeholder outreach, draft, proposed, and effective. Electronic versions of rules in each of these various phases may be viewed by clicking on the appropriate tabs on this page. 

In addition to adopting rules and laws, DDAGW adopts both policies and guidance documents. The purpose of a policy is to clarify and explain specific aspects of regulations (OAC) and law (ORC) so Ohio EPA and external parties have a common understanding of how environmental regulations are carried out in Ohio. Policies promote consistency and provide savings of both technical and administrative staff resources when dealing with the application of rules. Guidance documents provide information, suggestions and recommendations on possible or acceptable methods that may be used to meet or to achieve compliance with rules.

Electronic versions of policies and guidance may be viewed by clicking on the appropriate tab. Join a rules electronic mailing list to stay informed about current rule-making and opportunities to provide comment during the process.

Early Stakeholder Outreach

As of January 1, 2012, Ohio EPA will conduct early stakeholder outreach in response to requirements of Executive Order 2011-01K.  This outreach ensures stakeholders are brought into the rule process as early as possible.

The following documents have been distributed to interested parties for early stakeholder review and comment:

[There are currently no documents out for review.  The 2014-2016 Rulemaking Plan was distributed for Early Stakeholder Outreach during the periods, January 6 - February 7, 2014 and February 11 - March 13, 2014.]

April 3, 2014:  DDAGW finalizes 2014-2016 Rulemaking Plan

Interested Party Review

Ohio EPA distributes draft rules to interested parties for review and comment before they are filed with the Ohio General Assembly's Joint Committee on Agency Rule Review (JCARR). Ohio EPA considers comments received from this preliminary review and makes changes to the rules as appropriate.

The following draft rules have been distributed to interested parties for review and comment:


 2014 Miscellaneous 'No Change' Rules Package

February 5, 2014, notice to file miscellaneous rules with no changes.  

Business Impact Analysis for 2014 miscellaneous 'no' change rules

Questions and comments should be forwarded to Susan Baughman at (614) 644-2752 or by email at DDAGW_RULECOMMENTS@epa.ohio.gov with the subject line “2014 No Change Rules" no later than February 19, 2014.

Miscellaneous Rule Amendments, 2013

Public Notice:  DDAGW seeks comments on draft miscellaneous rule amendments.

*Please submit comments to ddagw_rulecomments@epa.state.oh.us.

Business Impact Analysis for draft miscellaneous rule amendments.

  • 3745-9-05 (Amend) Well construction.
  • 3745-91-12 (Rescind) Certification by political subdivision and investor-owned public utilities.
  • 3745-91-12 (New) Certification by political subdivision and investor-owned public utilities.
  • 3745-95-02 (Amend) Backflow prevention and cross-connection control.
  • 3745-95-03 (Amend) Surveys and investigations.
  • 3745-95-06 (Amend) Backflow prevention devices.
  • 3745-96-01 (Amend) Applicability and definitions.
  • 3745-96-04 (Amend) Report delivery and recordkeeping.

CLICK HERE for Draft revisions to the Ohio EPA Backflow Prevention and Cross-connection Control manual.

Proposed Rules

Ohio EPA considers comments received during interested party review and makes changes to the rules as appropriate. These rules are then proposed and filed with the Ohio General Assembly's Joint Committee on Agency Rule Review (JCARR) and other agencies as required by Ohio Revised Code section 119.03. Another opportunity for public comment is offered.  More information about proposed rules is on the Register of Ohio website.

The following proposed rules have been filed with JCARR:


PWS Definition and Water Source Designation Amendments

Revisions to policy PWS-01-002, Clarification of Public Water Systems Definition

2014 License to Operate (LTO) Rules

  • 3745-84-01 (Amend) Definitions.
  • 3745-84-02 (Amend) Application for a license to operate or maintain a public water system.
  • 3745-84-03 (Amend) Expiration and renewal of license to operate or maintain a public water system.
  • 3745-84-04 (Amend) Format and display of license to operate or maintain a public water system.
  • 3745-84-05 (Amend) Fees for operating or maintaining a public water system.
  • 3745-84-06 (Amend) Conditioning, denial, suspension and revocation of a license to operate or maintain a public water system.

Effective Rules

Ohio Administrative Code (OAC) rules administered by the Division of Drinking and Ground Waters are located on this page. These include rules for Ohio public drinking water systems adopted under Ohio Revised Code (ORC) chapter 6109, and rules for Underground Injection Control, adopted under ORC section 6111.043. 

Ohio EPA also issues policy and guidance documents related to the implementation of rules in the safe drinking water program. 

View effective rules by subject matter by clicking on an OAC Chapter below or click All DDAGW Rules for a complete copy of all effective drinking and ground water rules.  (Last revised 11/18/13)


  • 3745-7-01 (23 February 2012) Definitions.
  • 3745-7-02 (23 February 2012) Certified operators required. 
  • 3745-7-03 (23 February 2012) Public water system classification and staffing requirements.
  • 3745-7-04 (23 February 2012) Treatment works and sewerage system classification and staffing requirements.
  • 3745-7-05 (23 February 2012) Classification of operator certification. 
  • 3745-7-06 (23 February 2012) Certification of operators.
  • 3745-7-07 (23 February 2012) Operator in training. 
  • 3745-7-09 (23 February 2012) Recordkeeping requirements and responsibilities of a certified operator. 
  • 3745-7-10 (21 December 2006) Operator Certification Advisory Council. 
  • 3745-7-11 (21 December 2006) Duties of the Council.
  • 3745-7-12 (23 February 2012) Suspension or revocation of certification.
  • 3745-7-13 (23 February 2012) Reciprocity.
  • 3745-7-15 (23 February 2012) Expiration and renewal of operator certification.
  • 3745-7-17 (21 December 2006) Operator certification fees.
  • 3745-7-18 (23 February 2012) Conduct during the examination process.
  • 3745-7-19 (1 January 2013) Examination providers.
  • 3745-7-20 (1 January 2013) Certification of operators who pass an examination from an approved examination provider.
  • 3745-9-01 (1 September 2009) Definitions. 
  • 3745-9-02 (19 April 2012) Scope and Exemptions.
  • 3745-9-03 (1 September 2009) Monitoring Well.  
  • 3745-9-04 (1 September 2009) Well Siting.  
  • 3745-9-05 (19 April 2012) Well Construction. 
  • 3745-9-06 (1 May 2003) Well Construction, Specific Geologic Conditions.
  • 3745-9-07 (19 April 2012) Well Grouting for Construction or Closure. 
  • 3745-9-08 (19 April 2012) Well Disinfection.
  • 3745-9-09 (19 April 2012) Well Development and Pumping Test.
  • 3745-9-10 (19 April 2012) Abandoned Well Sealing.
  • 3745-34-01 (23 April 2009) Definitions.
  • 3745-34-02 (25 July 1984) Considerations under federal law.
  • 3745-34-03 (25 July 1984) Confidentiality of information. 
  • 3745-34-04 (23 April 2009) Classification of wells. 
  • 3745-34-05 (25 July 1984) Identification of underground sources of drinking water.
  • 3745-34-06 (25 July 1984) Prohibition of unauthorized injection.
  • 3745-34-07 (23 April 2009) Prohibition of movement of fluid into underground injection.
  • 3745-34-08 (23 April 2009) Prohibition of class IV wells.
  • 3745-34-09 (23 April 2009) Requirements for wells injecting hazardous wastes.
  • 3745-34-10 (25 July 1984) Waiver of requirement by director.
  • 3745-34-11 (2 May 2011) Class V wells.
  • 3745-34-12 (23 April 2009) Application by permit; authorization by permit.
  • 3745-34-13 (23 April 2009) Class I permit application.
  • 3745-34-14 (23 April 2009) Class I permit to drill applications.
  • 3745-34-15 (23 April 2009) Class I permit to operate applications. 
  • 3745-34-16 (23 April 2009) Class V permit requirements.
  • 3745-34-17 (23 April 2009) Signatories to permit applications and reports.
  • 3745-34-18 (20 January 1995) Class V Injection Well Area Permits.
  • 3745-34-19 (25 July 1984) Emergency permits.
  • 3745-34-20 (9 November 1984) Effect of a permit.
  • 3745-34-21 (11 March 2002) Duration of permits.
  • 3745-34-22 (25 July 1984) Transfer of permits.
  • 3745-34-23 (24 January 2000) Modification or revocation and re-issuance of permits.
  • 3745-34-24 (25 July 1984) Termination of permits.
  • 3745-34-25 (25 July 1984) Minor modifications of permits.
  • 3745-34-26 (20 January 1995) Conditions applicable to all permits.
  • 3745-34-27 (11 March 2002) Establishing drilling permit and injection permit conditions.
  • 3745-34-28 (25 July 1984) Schedule of compliance.
  • 3745-34-29 (25 July 1984) Requirements for recording and reporting of monitoring results.
  • 3745-34-30 (25 July 1984) Plan of corrective action.
  • 3745-34-32 (23 April 2009) Area of review.
  • 3745-34-33 (25 July 1984) Corrective action.
  • 3745-34-34 (24 January 2000) Mechanical integrity.
  • 3745-34-35 (23 April 2009) Criteria for establishing permitting priorities.
  • 3745-34-36 (25 July 1984) Plugging and abandoning class I wells.
  • 3745-34-37 (25 July 1984) Construction requirements for class I wells.
  • 3745-34-38 (16 December 1991) Operating, monitoring, and reporting requirements for class I wells.
  • 3745-34-39 (23 April 2009) Information to be considered by the director in authorizing class I wells.
  • 3745-34-40 (23 April 2009) Seismic Reflection Survey Requirements for Class I wells.
  • 3745-34-50 (16 December 1991) Criteria and standards for class I injection wells.
  • 3745-34-51 (24 January 2000) Minimum criteria for siting class I hazardous waste injection wells.
  • 3745-34-52 (16 December 1991) Area of review.
  • 3745-34-53 (16 December 1991) Corrective action for wells in the area of review.
  • 3745-34-54 (23 April 2009) Construction requirements.
  • 3745-34-55 (16 December 1991) Logging, sampling, and testing prior to new well operation.
  • 3745-34-56 (16 December 1991) Operating requirements.
  • 3745-34-57 (1 December 1993) Testing and monitoring requirements.
  • 3745-34-58 (16 December 1991) Reporting requirements.
  • 3745-34-59 (23 April 2009) Information to be evaluated by the director.
  • 3745-34-60 (16 December 1991) Closure.
  • 3745-34-61 (16 December 1991) Post closure.
  • 3745-34-62 (16 December 1991) Financial responsibility for closure and post closure care.
  • 3745-34-63 (23 April 2009) Class I annual permit fee; fee per ton of waste injected.
  • 3745-81-01 (31 October 2010) Definitions. 
  • 3745-81-02 (27 December 1978) Coverage.
  • 3745-81-03 (27 December 1978) Siting requirements.
  • 3745-81-04 (17 October 2003) Administrative penalties. 
  • 3745-81-10 (01 January 2010) Maximum residual disinfectant levels.
  • 3745-81-11 (22 February 2010) Maximum contaminant levels and best available technologies for inorganic contaminants.
  • 3745-81-12 (01 January 2010) Maximum contaminant levels and best available technologies for organic contaminants.
  • 3745-81-14 (01 January 2008) Maximum contaminant levels for microbiological contaminants.
  • 3745-81-15 (15 September 2004) Maximum contaminant levels for radium-226, radium-228, and gross alpha particle radioactivity in community water systems.
  • 3745-81-17 (13 September 1993) Treatment techniques.
  • 3745-81-19 (22 February 2010) Use of non-centralized treatment devices.
  • 3745-81-21 (01 January 2008) Coliform monitoring requirements.
  • 3745-81-22 (01 January 2010) Initial distribution system evaluations.
  • 3745-81-23 (01 January 2010) Inorganic chemical monitoring requirements.
  • 3745-81-24 (01 January 2010) Organic chemical monitoring requirements.  
  • 3745-81-26 (22 February 2010) Monitoring frequency for radioactivity in community water systems.
  • 3745-81-27 (31 October 2010) Analytical techniques.
  • 3745-81-28 (01 November 2004) Acceptability of analytical results.
  • 3745-81-29 (27 December 1978) Monitoring of consecutive public water systems.
  • 3745-81-31 (01 January 2010) Reporting requirements for public water systems.
  • 3745-81-32 (31 October 2010) Public notification.
  • 3745-81-33 (01 January 2010) Record maintenance.
  • 3745-81-41 (31 October 2010) Ground water rule - general requirements and applicability.
  • 3745-81-42 (31 October 2010) Ground water rule - ground water source microbial monitoring and analytical methods.
  • 3745-81-43 (31 October 2010) Ground water rule - treatment technique requirements for ground water systems.
  • 3745-81-44 (31 October 2010) Ground water rule - treatment technique violations for ground water systems.
  • 3745-81-45 (31 October 2010) Ground water rule - reporting and recordkeeping for ground water system.
  • 3745-81-60 (31 October 2010) Sanitary surveys.
  • 3745-81-64 (08 January 2010) General requirements of the "Long Term 2 Enhanced Surface Water Treatment (LT2) Rule."
  • 3745-81-65  (05 October 2013) Source monitoring requirements.
  • 3745-81-66  (05 October 2013) Source monitoring results and grandfathered data.
  • 3745-81-67 (08 January 2010) LT2 bin classification and treatment technique requirements.
  • 3745-81-68 (08 January 2010) Microbial toolbox options for meeting Cryptosporidium treatment requirements.
  • 3745-81-69 (08 January 2010) Reporting and recordkeeping requirements for LT2 only.
  • 3745-81-70 (01 January 2010) Monitoring requirements for disinfection residuals.
  • 3745-81-71 (05 October 2013) General requirements for filtration and disinfection of surface water sources.
  • 3745-81-72 (05 October 2013) Disinfection of water from surface water sources.
  • 3745-81-73 (05 October 2013) Filtration of water from surface water sources.
  • 3745-81-74 (05 October 2013) Turbidity and disinfection monitoring requirements for surface water systems.
  • 3745-81-75 (05 October 2013) Reporting and recordkeeping requirements.
  • 3745-81-76 (31 October 2010) Water source designation.
  • 3745-81-77 (01 January 2010) Treatment techniques for control of disinfection byproduct (DBP) precursors.
  • 3745-81-78 (01 January 2010) Optimization of distribution systems for control of disinfection byproducts.
  • 3745-81-79 (05 October 2013) Filter backwash recycling.
  • 3745-81-80 (24 July 2009) Control of lead and copper - general requirements.
  • 3745-81-81 (24 July 2009) Control of lead and copper; applicability of corrosion control treatment steps to small, medium-size, and large water systems.
  • 3745-81-82 (24 July 2009) Control of lead and copper; description of corrosion control treatment requirements. 
  • 3745-81-83 (24 July 2009) Control of lead and copper; source water treatment requirements.
  • 3745-81-84 (24 July 2009) Control of lead and copper - lead service line replacement requirements.
  • 3745-81-85 (24 July 2009) Control of lead and copper - public education, supplemental monitoring requirements and consumer notification of results.
  • 3745-81-86 ((24 July 2009) Control of lead and copper - monitoring requirements for lead and copper in tap water.
  • 3745-81-87 (24 July 2009) Control of lead and copper - monitoring requirements for water quality parameters.
  • 3745-81-88 (24 July 2009) Control of lead and copper - monitoring requirements for lead and copper in water entering the distribution system.
  • 3745-81-89 (24 July 2009) Analytical methods.
  • 3745-81-90 (24 July 2009) Control of lead and copper - reporting and recordkeeping requirements.
  • 3745-82-01 (1 October 2006) Definitions.
  • 3745-82-02 (13 September 1993) Secondary maximum contaminant levels.
  • 3745-82-03 (1 October 2006) Monitoring for compliance with secondary maximum contaminant levels.
  • 3745-83-01 (19 April 2012) Operational requirements.
  • 3745-84-01 (01 April 2009) Definitions.
  • 3745-84-02 (01 April 2009) Application for a license to operate or maintain a public water system.
  • 3745-84-03 (01 April 2009) Expiration and renewal of license to operate or maintain a public water system.
  • 3745-84-04 (01 April 2009) Format and display of license to operate or maintain a public water system.
  • 3745-84-05 (01 April 2009) Fees for operating or maintaining a public water system.
  • 3745-84-06 (01 April 2009) Conditioning, denial, suspension or revocation of a license to operate or maintain a public water system. 
  • 3745-87-01 (01 October 1999) Definitions.
  • 3745-87-02 (01 October 1999) Capability assurance plans.
  • 3745-89-01 (13 October 2008) Definitions. 
  • 3745-89-02 (18 June 2004) Analyses requiring laboratory certificate of approval.
  • 3745-89-03 (31 October 2010) Procedure for laboratory approval.
  • 3745-89-04 (18 June 2004) Renewal of laboratory certificate of approval.
  • 3745-89-05 (08 January 2010) Requirements for maintaining laboratory certification.
  • 3745-89-06 (14 September 2009) Director's actions for laboratory certification. 
  • 3745-89-07 (09 April 1990) Laboratory certificate property of state; display.
  • 3745-89-08 (31 October 2010) Reporting of analytical results.
  • 3745-89-09 (18 June 2004) Interim authorization for plant control tests.
  • 3745-89-10 (18 June 2004) Interim authorization for new contaminants and new methods.
  • 3745-89-11 (08 January 2010) Approved laboratories for the "Long Term 2 Enhanced Surface Water Treatment Rule."
  • 3745-91-01 (31 December 2006) Definitions.
  • 3745-91-02 (19 April 2012) Application for approval of plans.
  • 3745-91-03 (20 May 2010) Requirements for plan drawings.
  • 3745-91-04 (26 November 1980) Requirements for specifications.
  • 3745-91-05 (01 January 2002) Requirements for data sheet.
  • 3745-91-06 (19 April 2012) Requirements for supporting information.
  • 3745-91-07 (01 January 2002) Requirements for submittal letter.
  • 3745-91-08 (20 May 2010) Procedure for approval; changes.
  • 3745-91-09 (01 January 2002) Iron and  manganese treatment.
  • 3745-91-10 (01 September 2009) Drinking water source protection plan.
  • 3745-91-12 (01 January 1999) Certification by political subdivisions and investor-owned utilities.
  • 3745-92-01 (26 November 1980) Definitions.
  • 3745-92-02 (26 November 1980) Escrow deposit required.
  • 3745-92-03 (26 November 1980) Amount of deposit.
  • 3745-92-04 (26 November 1980) Release of escrow.
  • 3745-92-05 (26 November 1980) Orders of the director, notice to owner.
  • 3745-92-06 (26 November 1980) Fee for escrow deposit. 
  • 3745-95-01 (19 April 2012) Definitions.
  • 3745-95-02 (1 May 2003) Cross-connections.
  • 3745-95-03 (26 November 1980) Surveys and investigations.
  • 3745-95-04 (1 May 2003) Where protection is required.
  • 3745-95-05 (1 May 2003) Type of protection required.
  • 3745-95-06 (1 May 2003) Backflow prevention devices.
  • 3745-95-07 (8 August 2008) Booster pumps.
  • 3745-95-08 (26 November 1980) Violations.
  • 3745-95-09 (19 April 2012) Requirements for yard hydrants.
  • 3745-96-01 (24 July 2009) Applicability and definition.
  • 3745-96-02 (31 October 2010) Required report content.
  • 3745-96-03 (31 October 2010) Required additional health information.
  • 3745-96-04 (01 May 2001) Report delivery and recordkeeping.

Policies and Guidance

Currently effective policy and guidance documents related to the safe drinking water program are listed below by general topic. 


  • ENG-01-003:  Guidelines for Clarifier and Filter Ratings at Surface Water Treatment Plants
  • ENG-02-001:  Guidelines for Treatment Process Ratings at Precipitative (e.g., Lime) Softening Ground Water Plants
  • ENG-03-002:  Detail Plan Submission Guidance for Non-Community Public Water Systems
  • ENG-05-001:  Guidelines for Obtaining Approval of Membranes to Meet Particulate and Microbiological Removal Requirements for Surface Water
  • ENG-06-001:  Guideline for Evaluation and Implementation of Chloramination
  • ENG-07-001:  Guidelines for Obtaining Approval of Membranes to Meet Treatment Requirements for Ground Water Treatment
  • ENG-08-002:  ASTM AWWA Pipe Policy
  • ENG-09-001:  Guidelines for evaluating granular activated carbon (GAC) for disinfection by-product (DBP) precursor removal
  • ENG-10-001:  Guidance for Installation of Automatic Flush Hydrants in Distribution Systems
  • ENG-12-001:  Guidelines for Demonstration of On-Site Sodium Hypochlorite Generators to Meet Inactivation/Disinfection Requirements of Drinking Water
  • ENG-13-001:  Guidelines for Obtaining Secondary Filtration Credit for Compliance with the LT2 Rule 

In addition to providing the guidance documents listed below, the Division of Drinking and Ground Waters offers support to other Ohio EPA divisions on ground water issues.  Click here to learn more.

Ground Water Wells

Agency-wide

Division of Materials and Waste Management (DMWM) Guidance Documents issued by DDAGW

Division of Surface Water (DSW) Guidance Documents issued by DDAGW

  • LAB-01-002:  Fluoride Proficiency Test for Drinking Water Laboratories
  • OPR-01-001:  Significant Deficiencies for Sanitary Surveys
  • OPR-02-001:  Chlorine monitoring and compliance tracking for ground water systems
  • OPR-03-001:  Guidance for Flood Event Monitoring by Public Water Systems with Ground Water Sources
  • OPR-05-002:  Disinfection of finished water storage facilities and new mains
  • OPR-06-001:  Policy for Evaluating and Responding to Water Distribution Systems and Subsystems that have Depressurized (see Quick Reference Guides for Main Breaks and System Depressurizations)
  • WQ-01-006:  Guidance of Total Coliform Bacteria Monitoring for Small Public Water Systems (Population Less Than 3,301 Persons) 
  • WQ-06-001:  Limited Distribution of Public Notice
  • WQ-07-002:  Tier 1 Public Notice Requirements Policy
  • WQ-13-002:  Designation of Community Public Water Systems Vulnerable to Contamination from Beta Particle and Photon Radioactivity
  • WQ-14-001:  TOC Monitoring and Removal Requirements
  • WQ-17-001:  Guidance for Ground Water Rule Triggered Source Water Monitoring Plans and Options for Reducing Samples
  • WQ-18-001:  Responding to Algal Toxin Detections in Finished Water Samples at Public Water Systems
  • WQ-21-001:  Guidance for Hydrogeologic Sensitivity Assessment
  • WQ-22-001:  Guidance for Assessment Source Water Monitoring

    • Guidance for Hydrogeologic Sensitivity Assessment and Assessment Source Water Monitoring; Hydrogeologic Sensitivity Assessment and Assessment Source Water Monitoring Pilot Report