Is Stratham, NH Tap Water Safe to Drink?
Graded F — but Lead was detected above EPA limits. Here's what's in the water and how to remove it. What to do next ↓
36/100
waterverge.com Stratham, NH — Water Quality Report
Stratham's drinking water received a grade of F (36 out of 100), indicating failing water quality. The city's 18 water systems serve approximately 2,043 residents using groundwater.
Lead levels were measured at 18.0 ppb (90th percentile), which exceeds the EPA action level of 15 ppb. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 387 violations on record, including 168 health-based violations. 73 remain unresolved.
What to know about Stratham's water
Stratham ranks #104 out of 119 cities in New Hampshire for water quality, placing it among the lowest-rated in the state.
Stratham 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.
Lead levels exceed the EPA action level of 15 ppb, which typically indicates aging lead service lines or lead solder in the distribution system. An NSF 53-certified filter is strongly recommended for drinking and cooking water.
As a small community water system, Stratham may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 40 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Stratham, NH water safe to drink?
Stratham's drinking water has significant quality concerns based on EPA testing data. With a grade of F (36/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 18 water systems serve approximately 2,043 residents using groundwater (wells).
Recent water quality updates for Stratham
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Stratham's water quality assessment. Grade: F (36/100).
Contaminants: Lead and Copper Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Federal disaster declaration (FEMA DR-4740). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4370). Coastal Storm event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Stratham's water supply.
Exceeds EPA action level. Lead service line replacement and point-of-use filtration recommended.
Violation history
Stratham's water system has 387 total violations on record, including 168 health-based violations. 73 remain unresolved. 40 violations were issued in the last 5 years.
Flood & environmental risk
Rockingham 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. Local water sources include Oyster River, Lamprey River, Exeter River.
Where does Stratham's water come from?
Stratham's drinking water comes from groundwater (wells), supplied by 18 water systems serving approximately 2,043 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Oyster River (river), Lamprey River (river), Exeter River (river).
What Stratham residents can do
Recommended: NSF 53-certified pitcher or under-sink filter. This addresses the specific contaminants found in Stratham'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.
Run cold water for 30 seconds before drinking, especially in the morning. Lead and copper leach from household plumbing when water sits in pipes.
Stratham'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
Drought conditions
D2 — severe droughtRockingham 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
Rockingham 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 Stratham'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. | 18.0 | 15 | ppb | Inorganic | Over Limit |
Lead level (90th percentile)
Latest reading: 18.0 ppb (2023)
EPA action level: 15 ppb
See how Stratham compares by contaminant
Explore where Stratham ranks among all New Hampshire cities for specific contaminants.
Water source & infrastructure
Where Stratham's water comes from
Stratham'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 2,043 people through 18 water systems.
Water bodies near Stratham
Stratham is located near 3 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Stratham
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MONTROSE CONDOS | NH2232070 | 210 | GW |
| SALT RIVER CONDOS | NH2232030 | 195 | GW |
| THORNHILL CONDOS | NH2232020 | 175 | GW |
| GLENGARRY CONDOS | NH2232010 | 171 | GW |
| CHISHOLM FARM | NH2232200 | 168 | GW |
| STRATHAM GREEN CONDOS | NH2232050 | 150 | GW |
| BURNHAVEN | NH2232160 | 150 | GW |
| PENINSULA AT WINDING BROOK | NH2232040 | 128 | GW |
| TURNBERRY | NH2232110 | 115 | GW |
| VINEYARDS | NH2232190 | 111 | GW |
| BALMORAL CONDOS | NH2232060 | 105 | GW |
| PHEASANT RUN CONDOS | NH2232080 | 70 | GW |
| MUIRFIELD CLUSTER | NH2232130 | 69 | GW |
| JEWETT HILL | NH2232140 | 55 | GW |
| STONEARCH CONDO ASSN/KIRKWALL | NH2232210 | 52 | GW |
| ABERDEEN/WEST | NH2232150 | 46 | GW |
| STRATHAM WOODS | NH2232090 | 38 | GW |
| LAMINGTON HILL | NH2232170 | 35 | GW |
How Stratham compares
Full New Hampshire rankings →Stratham's score of 36/100 is below the average of 69/100 among major New Hampshire cities. 10 of 10 nearby cities score higher.
Nearby cities
View New Hampshire rankings →About Stratham, NH
Wikipedia →Epping is a town in Rockingham County, New Hampshire, United States. The population was 7,125 at the 2020 census, up from 6,411 at the 2010 census.
Learn more about your water
Guides and resources related to Stratham's water quality findings.
Explore water quality across Rockingham
Frequently asked questions
Is Stratham, NH tap water safe to drink?
Stratham's water quality earned a grade of F (36/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #104 out of 119 cities tested in New Hampshire.
What contaminants are in Stratham's water?
Lead was measured at 18.0 ppb (90th percentile). 387 violations are on record.
How is Stratham'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 Stratham?
Yes — lead levels exceed the EPA action level of 15 ppb. We recommend an NSF 53-certified filter or reverse osmosis system. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Stratham's water come from?
Stratham's water is sourced from Groundwater. The city has 18 water systems serving approximately 2,043 residents.
What health violations has Stratham's water system had?
Stratham has 168 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. 73 violations remain unresolved.
Is Stratham's groundwater at risk of contamination?
Stratham 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 387 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 Stratham's water compare to other cities?
Stratham ranks #104 out of 119 cities in New Hampshire (better than 13% of state cities) and #15503 out of 15744 cities nationally (2th percentile). The grade of F reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.