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Document ID us-dwrc-2025-12-29 Title Drinking Water Regulations and Contaminants URL https://www.epa.gov/sdwa/drinking-water-regulations-and-contaminants Jurisdiction /us Subdomain(s) none Language Status completed Analyzed at 2026-05-12 04:38:58.559825+00:00 Relevance inventory_targeted_fetch
2 Qualitative 16 Quantitative 0 Definitions

Q Qualitative Requirements (2)

Req ID Category Intent Legal Status Name Subdomain(s) Context Conditions Confidence
#Q001reportingreportingmandatoryFluoride Secondary Standard Exceedance Public Noticedrinking waterCommunity water systems that exceed the fluoride secondary standard of 2 mg/L, but do not exceed the primary standard of 4.0 mg/L for fluoride, must provide public notice to persons served no later than 12 months from the day the water system learns of the exceedance (40 CFR 141.208).Applies when fluoride levels exceed 2.0 mg/L but do not exceed 4.0 mg/Lhigh
#Q002operationalaestheticrecommendedSecondary Standards Recommendationdrinking waterEPA recommends secondary standards to water systems but does not require systems to comply with the standard.high

P Quantitative Requirements (16)

Req ID Category Intent Legal Status Name Subdomain(s) Limit Type Limit Value Context Conditions Confidence
#P001chemicalreportingmandatoryFluoride (Special Notice Exceedance Level)drinking waterrequirement> 2.0 mg/LEPA requires a special notice for exceedance of the fluoride secondary standard of 2.0 mg/L.Community water systems that exceed the fluoride secondary standard of 2 mg/L, but do not exceed the primary standard of 4.0 mg/L for fluoride, must provide public notice to persons served no later than 12 months.high
#P002chemicalhealthmandatoryFluoride (Primary Standard)drinking waterMAC4.0 mg/LPrimary standard for fluoridehigh
#P003chemicalaestheticrecommendedAluminumdrinking waterAO0.05 to 0.2 mg/LNational Secondary Drinking Water Regulationshigh
#P004chemicalaestheticrecommendedChloridedrinking waterAO250 mg/LNational Secondary Drinking Water Regulationshigh
#P005physicalaestheticrecommendedColordrinking waterAO15 color unitsNational Secondary Drinking Water Regulationshigh
#P006chemicalaestheticrecommendedCopperdrinking waterAO1.0 mg/LNational Secondary Drinking Water Regulationshigh
#P007chemicalaestheticrecommendedFluoridedrinking waterAO2.0 mg/LNational Secondary Drinking Water Regulationshigh
#P008chemicalaestheticrecommendedFoaming Agentsdrinking waterAO0.5 mg/LNational Secondary Drinking Water Regulationshigh
#P009chemicalaestheticrecommendedIrondrinking waterAO0.3 mg/LNational Secondary Drinking Water Regulationshigh
#P010chemicalaestheticrecommendedManganesedrinking waterAO0.05 mg/LNational Secondary Drinking Water Regulationshigh
#P011physicalaestheticrecommendedOdordrinking waterAO3 threshold odor numberNational Secondary Drinking Water Regulationshigh
#P012physicalaestheticrecommendedpHdrinking waterAO6.5-8.5 standard unitsNational Secondary Drinking Water Regulationshigh
#P013chemicalaestheticrecommendedSilverdrinking waterAO0.10 mg/LNational Secondary Drinking Water Regulationshigh
#P014chemicalaestheticrecommendedSulfatedrinking waterAO250 mg/LNational Secondary Drinking Water Regulationshigh
#P015physicalaestheticrecommendedTotal Dissolved Solidsdrinking waterAO500 mg/LNational Secondary Drinking Water Regulationshigh
#P016chemicalaestheticrecommendedZincdrinking waterAO5 mg/LNational Secondary Drinking Water Regulationshigh

D Definitions (0)

No definitions.