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Questions 1 - 25 of 59 for contaminants

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Why was sodium included on the Contaminant Candidate List 1 (CCL 1)?

Health effects from bacterial contamination in drinking water

What is the difference between an "organic" and an "inorganic" contaminant?

What is the difference between a maximum contaminant level goal (MCLG) and a reference dose (RfD)?

How is a maximum contaminant level goal (MCLG) different from a maximum contaminant level (MCL)?

Consumer Confidence Report only lists a few contaminants

What mass to activity ratio must be used to calculate the "net" alpha (gross alpha minus uranium and radon) to determine compliance with the gross alpha maximum contaminant level (MCL)?

How can a small system (one serving a population of 1, or less) obtain the Unregulated Contaminant Monitoring Rule (UCMR) testing data that EPA arranges and reports?

Maximum contaminant level (MCL) for heterotrophic plate count (HPC) in drinking water

Why did EPA develop a secondary maximum contaminant level (SMCL) range between .5mg/l - .2mg/l for aluminum, rather than a specific acceptable level?

How should a system calculate the running annual average to determine compliance with the trihalomethane maximum contaminant level (MCL) when it does not have monitoring data for one of the quarters?

Do maximum contaminant levels (MCLs) apply to drinking water at a free-flowing tap?

What chemical contaminants are regulated by the haloacetic acids (HAA5) standard, and do they have individual maximum contaminant levels (MCLs) or maximum contaminant level goals (MCLGs)?

What was EPA's final regulatory determination for regulating sulfate, which was a priority contaminant on the drinking water contaminant candidate list?

Is composite sampling permitted under the Unregulated Contaminant Monitoring Rule (UCMR)?

Sources of arsenic contamination in water

What are the types of contaminants for which bottled water is tested?

How does a public water system (PWS) determine the source of a contaminant when reporting it in the system's consumer confidence report (CCR)?

Should Unregulated Contaminant Monitoring Rule (UCMR) sampling data be submitted to EPA by the PWS or the laboratory that analyzes the sample?

What is considered a hydrogeologic barrier to fecal contamination, which would allow states to waive source water monitoring for sensitive systems under the Ground Water Rule?

How should compliance with the maximum contaminant level (MCL) for radionuclides be determined for a public water system does not collect all required monitoring samples?

If a water system discovers errors with their Unregulated Contaminant Monitoring Rule (UCMR) data and returns it to the laboratory for corrections, does the PWS have additional time to review and approve the corrected data?

Must samples taken pursuant to the Unregulated Contaminant Monitoring Rule (UCMR) be taken before or after treatment?

Maximum contaminant level (MCL) and maximum contaminant level goal (MCLG) for nickel

How do I address plumes of contaminated groundwater that originate from off-site sources in making a Migration of Contaminated Groundwater under Control EI determination at a RCRA facility?

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