Is Lexington Park, MD Tap Water Safe to Drink?
Graded B+, with 10 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
81.1/100
waterverge.com Lexington Park, MD — Water Quality Report
Lexington Park's drinking water received a grade of B+ (81.1 out of 100), indicating good water quality. The city's 1 water system serves approximately 892 residents using groundwater.
Lead levels were measured at -5.0 ppb (90th percentile), well within EPA limits. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 20 violations on record, including 2 health-based violations. 10 remain unresolved.
What to know about Lexington Park's water
Lexington Park ranks #46 out of 107 cities in Maryland for water quality, placing it mid-range in the state.
Lexington Park relies on groundwater, which is generally less vulnerable to surface contamination but can be affected by naturally occurring minerals like arsenic and nitrate, as well as agricultural and industrial runoff.
As a small community water system, Lexington Park may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Lexington Park, MD water safe to drink?
Lexington Park's drinking water has significant quality concerns based on EPA testing data. With a grade of B+ (81.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 892 residents using groundwater (wells).
Recent water quality updates for Lexington Park
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lexington Park's water quality assessment. Grade: B+ (81.1/100).
1 health-based. Contaminants: LEAD AND COPPER RULE REVISIONS.
Contaminants: TTHM, Total Haloacetic Acids (HAA5).
1 health-based. Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Lexington Park's water supply.
Well within EPA limits.
Violation history
Lexington Park's water system has 20 total violations on record, including 2 health-based violations. 10 remain unresolved. 4 violations were issued in the last 5 years.
Where does Lexington Park's water come from?
Lexington Park's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 892 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include St Marys Lake Near Callaway (lake), St Marys River At Great Mills (river), St George Creek At Piney Point (stream).
What Lexington Park residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Lexington Park's water.
Your water utility is required to publish an annual Consumer Confidence Report (CCR) with detailed testing results. Ask for the latest copy or check your utility's website.
Data: EPA SDWIS, UCMR 5 (PFAS), FEMA, NOAA. Last updated May 2026.
Top contaminants to know
View all ↓Violation summary
Violations & advisories
Top industrial polluters within 10 miles of Lexington Park
Industrial polluters nearby
Reported releases to surface water by facilities near Lexington Park, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
US NAVAL AIR STATION PATUXENT RIVER PATUXENT RIVER, MD20670 | — | — | 2.3 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Lexington Park
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- PATUXENT RIVER NAVAL AIR STATION2.0 mi
Source: EPA Superfund National Priorities List
Drought conditions
D2 — severe droughtSaint Mary's County is currently in D2 (severe drought) per the U.S. Drought Monitor (week of May 5, 2026). Drought can elevate disinfection-byproduct (TTHM/HAA5) levels and taste/odor issues as utilities draw from lower reservoirs.
Source: U.S. Drought Monitor, updated weekly by NDMC, USDA, and NOAA.
Full contaminants report
| Contaminant | Detected Level | EPA Limit | Unit | Category | Status |
|---|---|---|---|---|---|
| Lead (90th percentile) LeadHeavy Metal A toxic heavy metal that can leach into drinking water from older pipes, solder, and fixtures. No amount of lead in water is considered safe. Health EffectsBrain and nervous system damage in children, kidney damage, high blood pressure, and reproductive problems in adults. EPA Limit15 ppb action level Common SourcesCorrosion of lead pipes, lead solder, brass faucets, and household plumbing. | -5.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Lexington Park compares by contaminant
Explore where Lexington Park ranks among all Maryland cities for specific contaminants.
Water source & infrastructure
Where Lexington Park's water comes from
Lexington Park's drinking water is drawn from underground aquifers through wells.
Groundwater is naturally filtered through rock and soil layers, generally requiring less treatment than surface water. However, it can contain naturally occurring contaminants like arsenic, radon, and minerals.
Agricultural activity, septic systems, and industrial operations near well fields can introduce nitrates, pesticides, and volatile organic compounds.
The system is operated by private ownership and serves approximately 892 people through 1 water system.
Water bodies near Lexington Park
Lexington Park is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Lexington Park
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LORD CALVERT TRAILER PARK | MD0180213 | 892 | GW |
How Lexington Park compares
Full Maryland rankings →Lexington Park's score of 81.1/100 is above the average of 60/100 among major Maryland cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Maryland rankings →About Lexington Park, MD
Wikipedia →Lexington Park is a census-designated place (CDP) in St. Mary's County, Maryland, United States, and the principal community of the Lexington Park, Maryland Micropolitan Statistical Area. The population was 11,626 at the 2010 census.
Learn more about your water
Guides and resources related to Lexington Park's water quality findings.
Explore water quality across St. Mary'S
Frequently asked questions
Is Lexington Park, MD tap water safe to drink?
Lexington Park's water quality earned a grade of B+ (81.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #46 out of 107 cities tested in Maryland.
What contaminants are in Lexington Park's water?
Lead was measured at -5.0 ppb (90th percentile). 20 violations are on record.
How is Lexington Park's water quality grade calculated?
The grade is based on four factors: violation history (40%), lead and copper levels (25%), PFAS contamination (25%), and regulatory compliance (10%). The score is also adjusted based on how complete the available data is. See our methodology page for full details.
Do I need a water filter in Lexington Park?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lexington Park's water come from?
Lexington Park's water is sourced from Groundwater. The city has 1 water system serving approximately 892 residents.
What health violations has Lexington Park's water system had?
Lexington Park has 2 health-based violations on record. The most recent violation was recorded in October 2024. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 10 violations remain unresolved.
Is Lexington Park's groundwater at risk of contamination?
Lexington Park uses groundwater, which can be affected by naturally occurring contaminants like arsenic, radon, and nitrate, as well as agricultural runoff and industrial activity. The system has 20 violations on record that may relate to groundwater quality. Groundwater systems are generally less susceptible to surface contamination but should be monitored for emerging contaminants like PFAS.
How does Lexington Park's water compare to other cities?
Lexington Park ranks #46 out of 107 cities in Maryland (better than 57% of state cities) and #7601 out of 15744 cities nationally (52th percentile). The grade of B+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lexington Park's small water system affect quality?
Lexington Park's system serves approximately 892 residents. Small community water systems (under 3,300 people) may have fewer financial resources for infrastructure upgrades and advanced treatment technologies. However, they are held to the same EPA drinking water standards as larger systems. This system has 20 violations on record.