Phoenix, MD (21131)
City of Baltimore
Safety Grade 2
Health Violations 1
Filterable Contaminants
Contaminants & Recommended Filters
Filter options to consider
A Granular Activated Carbon (GAC, whole-house POE) is one option to consider. It can reduce Total Trihalomethanes (TTHM) when certified for that contaminant. Base the choice on your own water test and a certification for the contaminant of concern.
Want to know exactly what's in your tap water?
EPA data describes the water system as a whole, not the water at your tap. A home water test measures what actually comes out of your faucet.
Water Filter Analysis for Phoenix, MD
EPA records for water systems serving ZIP code 21131 include 1 contaminant: Total Trihalomethanes (TTHM). Review the system report before choosing filtration. Below are possible filter options and cost estimates; verify product-specific contaminant certification.
Total Trihalomethanes (TTHM)
Reference level: 0.080 mg/L
Long-term exposure above the MCL may increase cancer risk.
Other health-based violations on record for these systems do not name a contaminant with a filter entry here; the ZIP code report lists them.
About This Analysis
This analysis uses data from the U.S. EPA Safe Drinking Water Information System (SDWIS), which tracks compliance monitoring for public water systems. Contaminant information in this report covers records dated within the past 5 years. Filter recommendations are based on NSF/ANSI certified treatment technologies proven to reduce each specific contaminant.
Records map ZIP 21131 to City of Baltimore, a surface water system; service can vary by address. For the most accurate picture of your home's water quality, consider a professional water test.
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Frequently Asked Questions
How were these filters selected?
Filter information for this ZIP is informed by EPA SDWIS compliance records from the past 5 years; test your tap water or consult your utility for contaminant results. Filter types may vary by location; verify a product's certification for each contaminant of concern.
Do I need a whole-house or under-sink filter?
It depends on the contaminant type and your budget. Under-sink reverse osmosis systems can reduce drinking water contaminants such as lead, nitrates, and some PFAS when certified for those reductions; prices vary by model. Whole-house systems ($800–$2,000+) treat water where it enters your home, including water for showers and appliances; check each product's certification for the sediment, chlorine, or hardness issue you want to address.
How often should I replace filter cartridges?
Replace filter cartridges according to the manufacturer's schedule, which varies with water use and water quality. Check your filter manufacturer's guidelines and replace on schedule to maintain effectiveness.