If you live in Annapolis, Arnold, Severna Park, or anywhere else in Anne Arundel County, you’ve probably wondered whether your tap water is truly safe — or whether a water filtration system could make a meaningful difference in your home. It’s a fair question, and the answer is more nuanced than a simple yes or no.
Anne Arundel County’s drinking water meets all federal and state safety standards. That’s the good news. But “meets legal standards” and “ideal for your family’s health and home” aren’t always the same thing. This guide breaks down what’s actually in your local water, what the county’s own water quality reports reveal, and which filtration options are worth considering for Annapolis-area homeowners.
Where Does Annapolis Tap Water Come From?
Most residents in Annapolis and surrounding communities — including Severna Park, Arnold, Pasadena, and Edgewater — receive water from Anne Arundel County’s public water system, which draws from the Patuxent River and treats it at the Patuxent Water Reclamation Facility. A smaller portion of the county relies on private wells, which present their own set of concerns (and are strong candidates for filtration).
The county’s water treatment process includes coagulation, sedimentation, filtration, and disinfection — a multi-step process that removes most biological contaminants. What it doesn’t fully eliminate are trace chemicals, disinfection byproducts, dissolved minerals, and the occasional pipe-related contaminant that enters the water on its journey to your tap.
What Anne Arundel County’s Water Quality Reports Reveal
Anne Arundel County publishes an annual Consumer Confidence Report (CCR) detailing the levels of regulated contaminants detected in treated water. While levels consistently fall within EPA-mandated limits, several findings are worth noting for health-conscious homeowners:
- Chloramines: The county uses chloramine (chlorine + ammonia) to disinfect water and prevent bacterial regrowth in distribution pipes. While effective, chloramines can produce disinfection byproducts (DBPs) such as trihalomethanes (TTHMs) and haloacetic acids (HAA5), which are present at detectable levels. Long-term exposure to elevated DBPs has been linked to health concerns in some studies.
- Hardness: Anne Arundel County water is classified as moderately hard, typically ranging between 100–150 mg/L. Hard water isn’t a health hazard, but it causes scale buildup in pipes, water heaters, and appliances — reducing efficiency and shortening equipment lifespan.
- Sediment: Older distribution infrastructure and internal plumbing can introduce sediment, rust, and particles. This is especially common in homes built before 1986 that may still have galvanized steel or older copper pipes.
- Lead: While the county’s source water is lead-free, lead can leach into drinking water from service lines and household plumbing fixtures in older homes. Annapolis has a significant stock of pre-1986 housing. If your home was built before that year and hasn’t had its plumbing updated, lead testing is strongly recommended.
- PFAS (Per- and Polyfluoroalkyl Substances): These “forever chemicals” are a growing concern nationwide. Maryland has begun testing water systems for PFAS, and Anne Arundel County is actively monitoring its supply. Residents near military installations or industrial sites may want to pay particular attention to this category.
You can download Anne Arundel County’s most recent Consumer Confidence Report directly from the Anne Arundel County Department of Public Works website to review the specific detected levels for your area.
Types of Water Filtration Systems for Annapolis Homes
Understanding what’s in your water is step one. Step two is choosing the right water filtration system for your household’s needs and budget. Here’s a breakdown of the most common options:
Whole-House Water Filtration Systems
A whole-house (or “point-of-entry”) system installs where the main water line enters your home, treating every drop of water before it reaches any faucet, shower, or appliance. This is the most comprehensive solution — and often the most practical one for Anne Arundel County homeowners dealing with chloramine taste, sediment, or hardness issues.
Best for: Homeowners who want filtered water throughout the entire home, including showers, laundry, and dishwashers.
Typical cost: $800–$2,500 installed, depending on system capacity and filter type.
Maintenance: Filter cartridge replacements every 6–12 months.
Under-Sink Filtration Systems
Under-sink systems install at a single kitchen faucet (or a dedicated drinking water tap) and provide high-quality filtered water at the point of use. They’re more affordable upfront and ideal for families primarily concerned about drinking water quality.
Best for: Targeted drinking water improvement without a whole-home investment.
Typical cost: $200–$600 installed.
Maintenance: Filter changes every 6 months to 1 year.
Reverse Osmosis (RO) Systems
Reverse osmosis systems push water through a semi-permeable membrane that removes up to 99% of contaminants — including heavy metals, chloramines, nitrates, PFAS, and dissolved solids. RO systems are among the most effective filtration technologies available and are an excellent choice for Annapolis homeowners concerned about lead, PFAS, or chemical contaminants.
Best for: Families who want the highest level of contaminant removal, particularly lead or PFAS concerns.
Typical cost: $300–$700 for under-sink RO; $1,500–$4,000+ for whole-home RO.
Maintenance: Multiple filter stages; replacements typically needed once or twice per year.
Water Softeners
Strictly speaking, water softeners aren’t filtration systems — they use ion exchange to remove calcium and magnesium (hardness minerals) from water. If scale buildup is damaging your water heater, clogging your pipes, or leaving deposits on your fixtures, a water softener may be the most targeted solution. Many Severna Park and Arnold homeowners pair a softener with a carbon filter for a comprehensive approach.
Best for: Homes with hard water causing appliance and pipe damage.
Typical cost: $800–$2,000 installed.
Signs Your Annapolis Home Could Benefit from Filtration
Not sure if you need a filtration system? Watch for these common indicators:
- Chlorine smell or chemical taste from your tap water
- White, chalky scale deposits on faucets, showerheads, or inside your kettle
- Reddish or brownish tinting in water (especially from hot water lines)
- Frequent plumbing repairs or reduced water heater efficiency
- Skin irritation or dryness after showering
- An older home (pre-1986) with original plumbing
- Reliance on a private well
If you’re checking several of these boxes, a water quality test is the logical next step. A licensed plumber can test your water and recommend the right filtration approach for your specific situation — rather than a one-size-fits-all solution.
What About Severna Park and Arnold Homeowners?
Residents in Severna Park and Arnold face many of the same water quality conditions as Annapolis proper, since most of these communities draw from the same Anne Arundel County system. However, Severna Park’s mix of older neighborhoods and waterfront properties can mean additional considerations: homes near the Magothy River or Severn River may have private wells susceptible to agricultural runoff and seasonal nitrate fluctuations. If your Severna Park home uses well water, annual testing and a dedicated filtration system aren’t optional — they’re essential.
Arnold homeowners in newer subdivisions generally have fewer concerns about aging pipes, but chloramine and hardness issues are still relevant, and the proximity to certain commercial corridors makes PFAS monitoring worthwhile.
Getting a Professional Water Quality Assessment
The most reliable way to know what’s in your water — and what to do about it — is to have a licensed plumber conduct a professional water quality assessment. A test will identify the specific contaminants present at your tap, so you can invest in the right solution rather than guessing.
At Heidler Plumbing, we’ve been helping Annapolis, Severna Park, Arnold, and Anne Arundel County homeowners with water quality solutions since 1947. Our licensed plumbers can test your water, explain your results in plain language, and install the filtration system that’s right for your home and budget — whether that’s a simple under-sink filter or a whole-house reverse osmosis system.
Ready to find out what’s really in your tap water? Call Heidler Plumbing at (410) 268-7191 to schedule a water quality consultation. You can also learn more about our water filtration services in Annapolis and surrounding areas. Clean, safe water for your family starts with a single call.
