Is Maupin, OR Tap Water Safe to Drink?
Graded D, with 28 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
49.8/100
waterverge.com Maupin, OR — Water Quality Report
Maupin's drinking water received a grade of D (49.8 out of 100), indicating poor water quality. The city's 2 water systems serve approximately 560 residents using groundwater.
Lead levels were measured at 1.9 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 133 violations on record, including 12 health-based violations. 28 remain unresolved.
What to know about Maupin's water
Maupin ranks #134 out of 213 cities in Oregon for water quality, placing it below average in the state.
Maupin 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, Maupin may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 23 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Maupin, OR water safe to drink?
Maupin's drinking water has significant quality concerns based on EPA testing data. With a grade of D (49.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 2 water systems serve approximately 560 residents using groundwater (wells).
Recent water quality updates for Maupin
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Maupin's water quality assessment. Grade: D (49.8/100).
Contaminants: Consumer Confidence Rule, Groundwater Rule.
Contaminants: Groundwater Rule.
Contaminants: Public Notice.
Federal disaster declaration (FEMA DR-3228). Coastal Storm event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1099). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Maupin's water supply.
Well within EPA limits.
Violation history
Maupin's water system has 133 total violations on record, including 12 health-based violations. 28 remain unresolved. 23 violations were issued in the last 5 years.
Flood & environmental risk
Wasco County has experienced 5 federally declared disasters since 1964. 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 White River Below Tygh Valley, Deschutes River.
Where does Maupin's water come from?
Maupin's drinking water comes from groundwater (wells), supplied by 2 water systems serving approximately 560 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include White River Below Tygh Valley (river), Deschutes River (river).
What Maupin residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Maupin'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.
Maupin'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 droughtWasco 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
Wasco County has experienced 5 federally declared disasters since 1964. 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. | 1.9 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Maupin compares by contaminant
Explore where Maupin ranks among all Oregon cities for specific contaminants.
Water source & infrastructure
Where Maupin's water comes from
Maupin'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 560 people through 2 water systems.
Water bodies near Maupin
Maupin is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Maupin
| System Name | PWSID | Population | Source |
|---|---|---|---|
| MAUPIN, CITY OF | OR4100510 | 420 | GW |
| PINE GROVE WATER DIST (WASCO) | OR4101122 | 140 | GW |
How Maupin compares
Full Oregon rankings →Maupin's score of 49.8/100 is above the average of 42/100 among major Oregon cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oregon rankings →About Maupin, OR
Wikipedia →Maupin is a city in Wasco County, Oregon, United States. Located on the Deschutes River, much of the city's economy is related to the river through outdoor activities, such as fishing and rafting. As of the 2020 census, Maupin had a population of 427.
Learn more about your water
Guides and resources related to Maupin's water quality findings.
Explore water quality across Wasco
Frequently asked questions
Is Maupin, OR tap water safe to drink?
Maupin's water quality earned a grade of D (49.8/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #134 out of 213 cities tested in Oregon.
What contaminants are in Maupin's water?
Lead was measured at 1.9 ppb (90th percentile). 133 violations are on record.
How is Maupin'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 Maupin?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Maupin's water come from?
Maupin's water is sourced from Groundwater. The city has 2 water systems serving approximately 560 residents.
What health violations has Maupin's water system had?
Maupin has 12 health-based violations on record. The most recent violation was recorded in July 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 28 violations remain unresolved.
Is Maupin's groundwater at risk of contamination?
Maupin 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 133 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 Maupin's water compare to other cities?
Maupin ranks #134 out of 213 cities in Oregon (better than 37% of state cities) and #13215 out of 15744 cities nationally (16th percentile). The grade of D reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.