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  3. /NOM-001-SEMARNAT-2021
SEMARNAT (Environment)EnvironmentalActive

NOM-001-SEMARNAT-2021

Permissible limits of pollutants in wastewater discharges to receiving bodies

Establishes maximum permissible pollutant limits in wastewater discharges to national water bodies. Applies to all industries discharging wastewater.

Last updated: 2024

Affected products

Water treatment systemsIndustrial filtration equipmentChemical treatment reagents

Compliance requirements

  • Meet BOD, COD, suspended solids limits
  • Heavy metal limits in discharge
  • Quarterly quality monitoring
  • CONAGUA discharge permit
  • Annual discharge report

Related tariff codes

These tariff codes may be subject to this NOM. Check the specific code to confirm.

8421.21.013824.99.01

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