Is Dallesport, WA Tap Water Safe to Drink?
Graded C+, with 14 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
67/100
waterverge.com Dallesport, WA — Water Quality Report
Dallesport's drinking water received a grade of C+ (67 out of 100), indicating fair water quality. The city's 4 water systems serve approximately 923 residents using groundwater.
Lead levels were measured at 0.4 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 325 violations on record, including 2 health-based violations. 14 remain unresolved.
What to know about Dallesport's water
Dallesport ranks #177 out of 294 cities in Washington for water quality, placing it below average in the state.
Dallesport 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, Dallesport may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 15 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Dallesport, WA water safe to drink?
Dallesport's drinking water has significant quality concerns based on EPA testing data. With a grade of C+ (67/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 4 water systems serve approximately 923 residents using groundwater (wells).
Recent water quality updates for Dallesport
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Dallesport's water quality assessment. Grade: C+ (67/100).
Contaminants: Revised Total Coliform Rule.
Contaminants: Revised Total Coliform Rule.
Contaminants: Nitrate.
Federal disaster declaration (FEMA DR-4650). Flood event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-1817). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Dallesport's water supply.
Well within EPA limits.
Violation history
Dallesport's water system has 325 total violations on record, including 2 health-based violations. 14 remain unresolved. 15 violations were issued in the last 5 years.
Flood & environmental risk
Klickitat County has experienced 7 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 Columbia River, Klickitat River.
Where does Dallesport's water come from?
Dallesport's drinking water comes from groundwater (wells), supplied by 4 water systems serving approximately 923 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate. Nearby water bodies include Columbia River (river), Klickitat River (river).
What Dallesport residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Dallesport'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.
Dallesport'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 Dallesport
Industrial polluters nearby
Reported releases to surface water by facilities near Dallesport, ranked by pounds discharged annually.
| Facility | Top chemical | To surface water (lbs/yr) | Distance |
|---|---|---|---|
AMERITIES WEST LLC THE DALLES, OR97058 | — | — | 2.3 mi |
HOOD RIVER SAND GRAVEL & READY MIX - THE DALLES THE DALLES, OR97058 | — | — | 1.7 mi |
HYDRO EXTRUSION USA LLC THE DALLES, OR97058 | — | — | 1.7 mi |
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites within 10 miles of Dallesport
Superfund sites nearby
Federally tracked hazardous-waste sites on the EPA National Priorities List. Proximity does not necessarily indicate tap-water contamination — the connection depends on hydrology and treatment.
- UNION PACIFIC RAILROAD CO TIE TREATING PLANT2.3 mi
Source: EPA Superfund National Priorities List
Flood & disaster history
Klickitat County has experienced 7 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. | 0.4 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Dallesport compares by contaminant
Explore where Dallesport ranks among all Washington cities for specific contaminants.
Water source & infrastructure
Where Dallesport's water comes from
Dallesport'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 923 people through 4 water systems.
Water bodies near Dallesport
Dallesport is located near 2 notable water bodies. These water bodies contribute to the regional watershed and may indirectly affect groundwater quality.
Water systems serving Dallesport
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DALLESPORT WATER DISTRICT | WA5317715 | 598 | GW |
| MURDOCK WATER | WA5300682 | 233 | GW |
| MOUNTAIN VIEW ASSOCIATION | WA5320527 | 60 | GW |
| DALLESPORT DOMESTIC WATER SHARERS | WA5315077 | 32 | GW |
How Dallesport compares
Full Washington rankings →Dallesport's score of 67/100 is above the average of 53/100 among major Washington cities. It outscores 7 of 10 nearby cities.
Nearby cities
View Washington rankings →About Dallesport, WA
Learn more about your water
Guides and resources related to Dallesport's water quality findings.
Explore water quality across Klickitat
Frequently asked questions
Is Dallesport, WA tap water safe to drink?
Dallesport's water quality earned a grade of C+ (67/100). Some concerns have been identified. Consider a water filter for an extra layer of protection. The city ranks #177 out of 294 cities tested in Washington.
What contaminants are in Dallesport's water?
Lead was measured at 0.4 ppb (90th percentile). 325 violations are on record.
How is Dallesport'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 Dallesport?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Dallesport's water come from?
Dallesport's water is sourced from Groundwater. The city has 4 water systems serving approximately 923 residents.
What health violations has Dallesport's water system had?
Dallesport has 2 health-based violations on record. The most recent violation was recorded in November 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 14 violations remain unresolved.
Is Dallesport's groundwater at risk of contamination?
Dallesport 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 325 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 Dallesport's water compare to other cities?
Dallesport ranks #177 out of 294 cities in Washington (better than 40% of state cities) and #11298 out of 15744 cities nationally (28th percentile). The grade of C+ reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.