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Personalized recommendations based on Marion's actual water quality data
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These are the contaminants your filter needs to address, ranked by how close they are to EPA limits.
| Contaminant | Detected Level | EPA Limit | % of Limit | Status |
|---|---|---|---|---|
| Haloacetic Acids | 23.9267 ug/L | 60 ug/L | 40% | Safe |
| Chromium | 0.0283 mg/L | 0.1 mg/L | 28% | Safe |
| Lead | 0.0032 mg/L | 0.015 mg/L | 21% | Safe |
| Arsenic | 0.0021 mg/L | 0.01 mg/L | 21% | Safe |
| Nitrate | 1.9645 mg/L | 10 mg/L | 20% | Safe |
| Total Trihalomethanes | 14.7179 ug/L | 80 ug/L | 18% | Safe |
| Mercury | 0.0004 mg/L | 0.002 mg/L | 18% | Safe |
| Fluoride | 0.6625 mg/L | 4 mg/L | 17% | Safe |
Based on Marion's specific contaminant profile, here are the filter types we recommend.
Your water contains lead, arsenic, nitrates, fluoride — reverse osmosis is one of the most effective filtration methods for removing these specific contaminants. RO systems push water through a semipermeable membrane that blocks up to 99% of dissolved contaminants.
Your water contains disinfection byproducts. Activated carbon filters use adsorption to trap these contaminants as water passes through the carbon media. They are highly effective at improving taste and removing organic chemicals.
Your water contains nitrates, which are particularly concerning for infants and pregnant women. Ion exchange filters swap harmful ions like nitrate for harmless ones like chloride, effectively reducing nitrate levels.
Our recommendations are based on city-wide data. For the most accurate results, test your home's specific water — contaminant levels can vary by neighborhood and plumbing age.
Get a Home Water Test KitCompare different filter types at a glance. Rows highlighted in blue are recommended for Marion's water.
| Filter Type | Removes | Best For | Price | Maintenance |
|---|---|---|---|---|
| Pitcher Filter | Chlorine, taste, odor, some metals | Basic taste improvement, budget-conscious | $20 - $50 | Replace filter every 1-2 months |
| Faucet Mount | Chlorine, lead, some bacteria, VOCs | Convenient, no counter space needed | $20 - $80 | Replace filter every 2-3 months |
| Under-Sink Carbon | Chlorine, VOCs, PFAS, lead (certified models) | Families wanting better filtration without RO | $50 - $300 | Replace filter every 6-12 months |
| Reverse Osmosis | Lead, arsenic, PFAS, nitrates, fluoride, 99% of contaminants | Comprehensive contaminant removal | $150 - $600 | Replace filters annually, membrane every 2-3 years |
| Whole House | Chlorine, sediment, rust, VOCs, some metals | Filtering all water in the home | $300 - $1,500 | Replace filters every 6-12 months |
Marion draws its water from surface water sources such as rivers, lakes, or reservoirs. Surface water is more susceptible to contamination from agricultural runoff, industrial discharge, and stormwater. It typically requires more treatment and is more likely to contain disinfection byproducts (like trihalomethanes) formed during the chlorination process. A filter that addresses chlorine and organic compounds is especially useful for surface water.
Marion is served by 1 water system, serving a population of approximately 27,730 residents in Grant County.
Marion's water scores 73/100, which is decent but has some elevated contaminants. A water filter is recommended to reduce Haloacetic Acids and Chromium levels. This is especially important for households with children, pregnant women, or anyone with health sensitivities.
Based on Marion's water quality data, the most important contaminants to filter are Haloacetic Acids, Chromium, Lead. We recommend a Reverse Osmosis System, which removes: Lead, Arsenic, PFAS/PFOA, Nitrates, and more. Different filter types target different contaminants, so choosing the right one depends on your specific water profile.
For Marion residents on a budget, a faucet-mount filter ($20-$80) offers the best value. These provide better filtration than pitchers and are more convenient. Look for NSF/ANSI 53 certification, which means the filter is tested for health-related contaminants like lead. If your budget allows, an under-sink carbon filter ($50-$150) provides even better filtration for a modest investment.
For most Marion residents, a whole house filter isn't strictly necessary since your water quality score is 73/100. An under-sink filter for your kitchen (for drinking and cooking water) is usually sufficient. However, a whole house filter makes sense if you want to reduce chlorine exposure during showers, protect your appliances from sediment, or have specific concerns about skin sensitivity to water chemicals.
Filter recommendations are based on publicly available water quality data from EPA and state regulatory databases. Individual water quality may vary based on your specific location within Marion, the age and condition of your plumbing, and seasonal fluctuations. Always test your water for the most accurate results. The filter types recommended on this page are general guidance — specific product performance may vary. Consult with a water treatment professional for complex contamination issues.
Data last updated: 2026-02-03. Filter recommendations are reviewed quarterly.