water quality standards - dnr€¦ · 26/12/2019 · water quality standards: past, present, &...
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![Page 1: Water Quality Standards - DNR€¦ · 26/12/2019 · Water Quality Standards: Past, Present, & Future Angela Falls WQS Unit Chief. Water Protection Program](https://reader035.vdocuments.us/reader035/viewer/2022071102/5fdbce16bf3fe315cb075f39/html5/thumbnails/1.jpg)
Water Quality
Standards: Past, Present,
& FutureAngela Falls
WQS Unit ChiefWater Protection Program
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WQS Past
2018 2019 2020 2021 2022
Revisions to the WQS rule are published in Missouri’s
CSR in April 2018
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2018 WQS Approval (1 of 3)December 14, 2018
1 Item: Numeric Nutrient Criteria for Lakes
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Lake Ecoregion
Chl-a Response
Impairment Thresholds
Nutrient Screening Thresholds
TP TN Chl-a
Plains 30 49 843 18
Ozark Border 22 40 733 13
Ozark Highlands 15 16 401 6
Lake Ecoregion Values (µg/L)
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Nutrient Criteria Lawsuit
• Missouri Coalition for the Environment sued EPA on December 3, 2019 for their approval of Missouri’s numeric nutrient criteria for lakes.
• The Department has filed a motion to intervene.
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• We are proceeding with implementation of the criteria as planned prior to the lawsuit.
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2018 WQS Approval (2 of 3)July 30, 2019
• Mixing Zones and ZIDs• Water Hardness• General Criteria Revisions• Chronic Cadmium Criteria• MUDD Update• Antidegradation
Implementation Procedure
• Losing Stream Reference and Table J
• Modify Site-Specific Criteria Table
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2018 WQS Approval (3 of 3)December 26, 2019
• MDV Framework• Waters of the State
Definition• Section 304(a)
Water Quality Criteria
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• Arsenic• Chromium VI • Mercury• Methylmercury• Nickel • Polychlorinated
Biphenyls (PCBs)• Tributylin (TBT)• Alkalinity • Chlorine, Total
Residual• Cyanide• DDT• Acrolein• Aldrin• Endosulfan
• Carbaryl• Chlordane• Chlorpyrifos• Diazinon• Dieldrin• Endrin• Lindane• Heptachlor• Heptachlor
Epoxide• Parathion• Toxaphene• Nonylphenol• Phenol • Pentachlorophenol
304(a) AQL Criteria
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Multiple Discharger Variance
https://dnr.mo.gov/env/wpp/wqstandards/multi-discharger-water-quality-standards-variances.htm
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Next Steps:• Identify
Candidates• Finalize
Resources• Train Staff
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2018 WQSStill waiting…
• WQS Variance – Kirksville• pH (4-day average)• Errors: 2,4-dichlorophenol Hexachlorocyclopentadiene Table I truncated
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We are actively working with EPA on the remaining items.
Errors will be corrected in the current rulemaking.
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WQS Present
2018 2019 2020 2021 2022
Triennial Review Process Begins Draft RIR
PN Begins
Proposed Rule Published in CSR Final Rule
Published in CSR(Effective 30 days after)
WQS Workgroup Meetings
Public Hearing
CWC Adoption
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WQS Present - Scope
• Aluminum• Cadmium (acute)• Chloride plus sulfate• DWS and IND use review• MUDD WBID revision by
watershed• Variances – Joplin, Salem,
Bolivar
• Site-specific DO criteria (Blue Springs)
• Losing stream language moved to 7.015
• MDV Framework revisions• Update MUDD with UAA
and presumed use review results
• Rule text and table corrections
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WQS Future
2018 2019 2020 2021 2022
WQS Project Prioritization and
Planning
WQS Project Inventory Open for Public Comment
Work on prioritized WQS Projects Begins
Next Triennial Review Process Begins
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WQS Project Prioritization and Planning
Brainstorming Sessions with WQS Staff• How well does an item “fit” our DNR mission?• How much “work” will an item take?
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WQS Project Inventory
• Listing of WQS Projects categorized by priority• Identifies the stage the project is in• Identifies the point of contact• Allows for transparency
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Will be available for public comment soon!
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Stay in the Loop!Contact Me• Water Quality Standards: [email protected]• Angela Falls: [email protected]
Get Updates• WQS web:
https://dnr.mo.gov/env/wpp/wqstandards/index.html• Rulemaking web: https://dnr.mo.gov/env/wpp/rules/wpp-
rule-dev.htm• WQS Workgroup: https://dnr.mo.gov/env/wpp/cwforum/adv-
uncl-waters-wetlands.htm
NOTE: DNR’s website will be updated later this year