Is Rolla, ND Tap Water Safe to Drink?
Graded A-, with 3 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
87.9/100
waterverge.com Rolla, ND — Water Quality Report
Rolla's drinking water received a grade of A- (87.9 out of 100), indicating good water quality. The city's 1 water system serves approximately 1,280 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 7 violations on record, including 1 health-based violation. 3 remain unresolved.
What to know about Rolla's water
Rolla ranks #46 out of 103 cities in North Dakota for water quality, placing it mid-range in the state.
Rolla 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, Rolla may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
Water quality score
See methodology →Is Rolla, ND water safe to drink?
Rolla's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (87.9/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 1,280 residents using groundwater (wells).
Recent water quality updates for Rolla
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Rolla's water quality assessment. Grade: A- (87.9/100).
Contaminants: Lead and Copper Rule.
Federal disaster declaration (FEMA DR-4323). Flood event — may have impacted local water infrastructure.
Contaminants: Chlorine.
Federal disaster declaration (FEMA DR-4118). Flood event — may have impacted local water infrastructure.
Contaminants: Lead and Copper Rule.
Key contaminant findings
Based on the most recent EPA sampling data for Rolla's water supply.
Well within EPA limits.
Violation history
Rolla's water system has 7 total violations on record, including 1 health-based violation. 3 remain unresolved. 1 violation was issued in the last 5 years.
Flood & environmental risk
Rolette County has experienced 10 federally declared disasters since 1979. 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 Rolla's water come from?
Rolla's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 1,280 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Rolla residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Rolla'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.
Rolla'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
Rolette County has experienced 10 federally declared disasters since 1979. 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 Rolla compares by contaminant
Explore where Rolla ranks among all North Dakota cities for specific contaminants.
Water source & infrastructure
Where Rolla's water comes from
Rolla'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 1,280 people through 1 water system.
Water systems serving Rolla
| System Name | PWSID | Population | Source |
|---|---|---|---|
| ROLLA CITY OF | ND4000834 | 1,280 | GW |
How Rolla compares
Full North Dakota rankings →Rolla's score of 87.9/100 is above the average of 82/100 among major North Dakota cities. It outscores 6 of 10 nearby cities.
Nearby cities
View North Dakota rankings →About Rolla, ND
Wikipedia →Rolla is a city in Rolette County, North Dakota, United States. It is the county seat of Rolette County. The population was 1,223 at the 2020 census. The city contains a small park and a small outdoor pool.
Learn more about your water
Guides and resources related to Rolla's water quality findings.
Explore water quality across Rolette
Frequently asked questions
Is Rolla, ND tap water safe to drink?
Rolla's water quality earned a grade of A- (87.9/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #46 out of 103 cities tested in North Dakota.
What contaminants are in Rolla's water?
Lead was measured at 0.0 ppb (90th percentile). 7 violations are on record.
How is Rolla'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 Rolla?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Rolla's water come from?
Rolla's water is sourced from Groundwater. The city has 1 water system serving approximately 1,280 residents.
What health violations has Rolla's water system had?
Rolla has 1 health-based violation on record. The most recent violation was recorded in November 2023. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 3 violations remain unresolved.
Is Rolla's groundwater at risk of contamination?
Rolla 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 7 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 Rolla's water compare to other cities?
Rolla ranks #46 out of 103 cities in North Dakota (better than 55% of state cities) and #3777 out of 15744 cities nationally (76th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Rolla's small water system affect quality?
Rolla's system serves approximately 1,280 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 7 violations on record.