Is Lisbon, ND Tap Water Safe to Drink?
Graded A-, with 2 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
86.7/100
waterverge.com Lisbon, ND — Water Quality Report
Lisbon's drinking water received a grade of A- (86.7 out of 100), indicating good water quality. The city's 2 water systems serve approximately 3,829 residents using groundwater.
Lead levels were measured at 0.0 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 3 violations on record, including 1 health-based violation. 2 remain unresolved.
What to know about Lisbon's water
Lisbon ranks #56 out of 103 cities in North Dakota for water quality, placing it below average in the state.
Lisbon 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.
Water quality score
See methodology →Is Lisbon, ND water safe to drink?
Lisbon's tap water meets most EPA standards but has areas that warrant attention. With a grade of A- (86.7/100), some contaminant levels or compliance issues suggest that residents may benefit from additional filtration. The city's 2 water systems serve approximately 3,829 residents using groundwater (wells).
Recent water quality updates for Lisbon
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Lisbon's water quality assessment. Grade: A- (86.7/100).
Contaminants: Lead and Copper Rule.
Federal disaster declaration (FEMA DR-4717). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-4553). Flood event — may have impacted local water infrastructure.
1 health-based. Contaminants: Coliform (TCR).
Key contaminant findings
Based on the most recent EPA sampling data for Lisbon's water supply.
Well within EPA limits.
Violation history
Lisbon's water system has 3 total violations on record, including 1 health-based violation. 2 remain unresolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Ransom County has experienced 10 federally declared disasters since 1999. 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 Sheyenne River.
Where does Lisbon's water come from?
Lisbon's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 3,829 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Sheyenne River (river).
What Lisbon residents can do
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.
Lisbon'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
Flood & disaster history
Ransom County has experienced 10 federally declared disasters since 1999. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
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. | 0.0 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Lisbon compares by contaminant
Explore where Lisbon ranks among all North Dakota cities for specific contaminants.
Water source & infrastructure
Where Lisbon's water comes from
Lisbon'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 3,829 people through 2 water systems.
Water bodies near Lisbon
Lisbon is located near 1 notable water body. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Lisbon
| System Name | PWSID | Population | Source |
|---|---|---|---|
| LISBON CITY OF | ND3700574 | 2,154 | GW |
| SOUTHEAST WUD (CENTRAL-LISBON) | ND3701448 | 1,675 | GWP |
How Lisbon compares
Full North Dakota rankings →Lisbon's score of 86.7/100 is on par with the average of 82/100 among major North Dakota cities. It outscores 6 of 10 nearby cities.
Nearby cities
View North Dakota rankings →About Lisbon, ND
Wikipedia →Lisbon is a city in and the county seat of Ransom County, North Dakota, United States. The population was 2,204 at the 2020 census.
Learn more about your water
Guides and resources related to Lisbon's water quality findings.
Explore water quality across Ransom
Frequently asked questions
Is Lisbon, ND tap water safe to drink?
Lisbon's water quality earned a grade of A- (86.7/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #56 out of 103 cities tested in North Dakota.
What contaminants are in Lisbon's water?
Lead was measured at 0.0 ppb (90th percentile). 3 violations are on record.
How is Lisbon'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 Lisbon?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lisbon's water come from?
Lisbon's water is sourced from Groundwater. The city has 2 water systems serving approximately 3,829 residents.
What health violations has Lisbon's water system had?
Lisbon has 1 health-based violation 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. 2 violations remain unresolved.
Is Lisbon's groundwater at risk of contamination?
Lisbon 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 3 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 Lisbon's water compare to other cities?
Lisbon ranks #56 out of 103 cities in North Dakota (better than 46% of state cities) and #4512 out of 15744 cities nationally (71th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.