Is Gray, ME Tap Water Safe to Drink?
Graded B- — but Copper was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
70.4/100
waterverge.com Gray, ME — Water Quality Report
Gray's drinking water received a grade of B- (70.4 out of 100), indicating fair water quality. The city's 1 water system serves approximately 2,468 residents using groundwater.
Lead levels were measured at 2.3 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 10 violations on record, including 2 health-based violations. 7 remain unresolved.
What to know about Gray's water
Gray ranks #141 out of 168 cities in Maine for water quality, placing it among the lowest-rated in the state.
Gray 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, Gray may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 7 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Gray, ME water safe to drink?
Gray's drinking water has significant quality concerns based on EPA testing data. With a grade of B- (70.4/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 2,468 residents using groundwater (wells).
Recent water quality updates for Gray
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Gray's water quality assessment. Grade: B- (70.4/100).
Contaminants: Lead and Copper Rule.
1 health-based. Contaminants: Revised Total Coliform Rule.
1 health-based. Contaminants: Public Notice, Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-3598). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-3256). Hurricane event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Gray's water supply.
Well within EPA limits.
Exceeds EPA action level. Copper can leach from household plumbing — flush taps for 30 seconds before drinking.
Violation history
Gray's water system has 10 total violations on record, including 2 health-based violations. 7 remain unresolved. 7 violations were issued in the last 5 years.
Flood & environmental risk
Cumberland County has experienced 10 federally declared disasters since 1987. Flooding and severe storms can overwhelm water treatment plants, cause sewage overflows, and introduce agricultural runoff, bacteria, and sediment into drinking water supplies.
Where does Gray's water come from?
Gray's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 2,468 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Gray residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Gray'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.
Gray's area has a history of flooding. After severe weather, watch for boil water advisories from your local utility.
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 Gray
Industrial polluters nearby
Reported releases to surface water by facilities near Gray, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
DIELECTRIC LLC RAYMOND, ME04071 | — | — | 8.5 mi |
SABRE CORP RAYMOND, ME04071 | — | — | 9.3 mi |
OLDCASTLE LAWN & GARDEN POLAND SPRING, ME04274 | — | — | 9.9 mi |
PIKE INDUSTRIES INC. - POLAND POLAND, ME04274 | — | — | 9.4 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Drought conditions
D2 — severe droughtCumberland 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.
Flood & disaster history
Cumberland County has experienced 10 federally declared disasters since 1987. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Gray's water supply, we recommend the following filter types.
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. | 2.3 | 15 | ppb | Inorganic | Safe |
| Copper (90th percentile) CopperInorganic A metal that enters drinking water mainly through corrosion of copper plumbing. Small amounts are essential for health, but excess levels are harmful. Health EffectsGastrointestinal distress (nausea, vomiting, diarrhea) at short-term high levels; liver and kidney damage from long-term exposure. EPA Limit1.3 mg/L action level Common SourcesCorrosion of copper household plumbing, erosion of natural deposits. | 1.54 | 1.3 | mg/L | Inorganic | Over Limit |
Lead level trend (90th percentile)
Copper level (90th percentile)
Latest reading: 1.540 mg/L (1993)
EPA action level: 1.3 mg/L
See how Gray compares by contaminant
Explore where Gray ranks among all Maine cities for specific contaminants.
Water source & infrastructure
Where Gray's water comes from
Gray'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 local government ownership and serves approximately 2,468 people through 1 water system.
Water systems serving Gray
| System Name | PWSID | Population | Source |
|---|---|---|---|
| GRAY WATER DISTRICT | ME0090620 | 2,468 | GW |
How Gray compares
Full Maine rankings →Gray's score of 70.4/100 is below the average of 82/100 among major Maine cities. It outscores 2 of 10 nearby cities. 8 of 10 nearby cities score higher.
Nearby cities
View Maine rankings →About Gray, ME
Wikipedia →Gray is a town in Cumberland County, Maine, United States. The population was 8,269 at the 2020 census. It is part of the Portland-South Portland-Biddeford metropolitan area. and included in the Lewiston-Auburn, Maine metropolitan New England city and town area. Gray is located at the intersection of state Routes 4, 26, 100, 115, 202 and the Maine Turnpike exit 63 midway between the state's two largest cities, Portland and Lewiston. The town includes frontage on Little Sebago Lake, Crystal Lake, and Forest Lake.
Learn more about your water
Guides and resources related to Gray's water quality findings.
Explore water quality across Cumberland
Frequently asked questions
Is Gray, ME tap water safe to drink?
Gray's water quality earned a grade of B- (70.4/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #141 out of 168 cities tested in Maine.
What contaminants are in Gray's water?
Lead was measured at 2.3 ppb (90th percentile). 10 violations are on record.
How is Gray'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 Gray?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Gray's water come from?
Gray's water is sourced from Groundwater. The city has 1 water system serving approximately 2,468 residents.
What health violations has Gray's water system had?
Gray has 2 health-based violations on record. The most recent violation was recorded in September 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 7 violations remain unresolved.
Is Gray's groundwater at risk of contamination?
Gray 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 10 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 Gray's water compare to other cities?
Gray ranks #141 out of 168 cities in Maine (better than 16% of state cities) and #10741 out of 15744 cities nationally (32th percentile). The grade of B- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Gray's small water system affect quality?
Gray's system serves approximately 2,468 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 10 violations on record.