Is Dill City, OK Tap Water Safe to Drink?
Graded C-, with 5 unresolved violations on record. See what was cited — and what it means for your tap. What to do next ↓
59.8/100
waterverge.com Dill City, OK — Water Quality Report
Dill City's drinking water received a grade of C- (59.8 out of 100), indicating poor water quality. The city's 1 water system serves approximately 526 residents using groundwater.
Lead levels were measured at 6.8 ppb (90th percentile), which is within EPA limits but above recommended levels. This system has not yet been tested for PFAS under the EPA UCMR 5 program.
The system has 32 violations on record, including 24 health-based violations. 5 remain unresolved.
What to know about Dill City's water
Dill City ranks #157 out of 358 cities in Oklahoma for water quality, placing it mid-range in the state.
Dill City 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.
While lead levels are within EPA limits, they are above the recommended 5 ppb threshold that health organizations consider ideal. A point-of-use filter adds an extra layer of protection.
As a small community water system, Dill City may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
The system has seen 12 violations in the past five years, suggesting a pattern of compliance challenges that residents should monitor closely.
Water quality score
See methodology →Is Dill City, OK water safe to drink?
Dill City's drinking water has significant quality concerns based on EPA testing data. With a grade of C- (59.8/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 526 residents using groundwater (wells).
Recent water quality updates for Dill City
A timeline of significant water quality events, violations, and data updates.
Latest EPA compliance and testing data incorporated into Dill City's water quality assessment. Grade: C- (59.8/100).
1 health-based. Contaminants: Nitrate-Nitrite.
1 health-based. Contaminants: Nitrate-Nitrite.
Contaminants: Nitrate-Nitrite.
Federal disaster declaration (FEMA DR-3219). Hurricane event — may have impacted local water infrastructure.
Federal disaster declaration (FEMA DR-778). Flood event — may have impacted local water infrastructure.
Key contaminant findings
Based on the most recent EPA sampling data for Dill City's water supply.
Within EPA limits but above the American Academy of Pediatrics recommended level of 1 ppb. An NSF 53-certified filter provides additional protection.
Violation history
Dill City's water system has 32 total violations on record, including 24 health-based violations. 5 remain unresolved. 12 violations were issued in the last 5 years.
Flood & environmental risk
Washita County has experienced 3 federally declared disasters since 1982. 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 Dill City's water come from?
Dill City's drinking water comes from groundwater (wells), supplied by 1 water system serving approximately 526 people. Groundwater is generally less susceptible to surface contamination but can contain naturally occurring contaminants like arsenic, radon, and nitrate.
What Dill City residents can do
Recommended: NSF-certified water filter. This addresses the specific contaminants found in Dill City'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.
Dill City'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
D3 — extreme droughtWashita County is currently in D3 (extreme 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
Washita County has experienced 3 federally declared disasters since 1982. Flooding and severe weather can compromise water treatment infrastructure and introduce contaminants into drinking water supplies.
Recommended water filters
Based on contaminants detected in Dill City'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. | 6.8 | 15 | ppb | Inorganic | Safe |
Lead level trend (90th percentile)
See how Dill City compares by contaminant
Explore where Dill City ranks among all Oklahoma cities for specific contaminants.
Water source & infrastructure
Where Dill City's water comes from
Dill City'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 526 people through 1 water system.
Water systems serving Dill City
| System Name | PWSID | Population | Source |
|---|---|---|---|
| DILL CITY | OK2007507 | 526 | GW |
How Dill City compares
Full Oklahoma rankings →Dill City's score of 59.8/100 is above the average of 45/100 among major Oklahoma cities. It outscores 9 of 10 nearby cities.
Nearby cities
View Oklahoma rankings →About Dill City, OK
Wikipedia →Dill City is a town in Washita County, Oklahoma, United States. As of the 2020 census, Dill City had a population of 420.
Learn more about your water
Guides and resources related to Dill City's water quality findings.
Explore water quality across Washita
Frequently asked questions
Is Dill City, OK tap water safe to drink?
Dill City's water quality earned a grade of C- (59.8/100). Significant issues have been found. A water filter is strongly recommended. The city ranks #157 out of 358 cities tested in Oklahoma.
What contaminants are in Dill City's water?
Lead was measured at 6.8 ppb (90th percentile). 32 violations are on record.
How is Dill City'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 Dill City?
While lead levels are within EPA limits, a filter adds extra protection. Based on current data, basic filtration should suffice for additional peace of mind.
Where does Dill City's water come from?
Dill City's water is sourced from Groundwater. The city has 1 water system serving approximately 526 residents.
What health violations has Dill City's water system had?
Dill City has 24 health-based violations on record. The most recent violation was recorded in October 2025. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 5 violations remain unresolved.
Is Dill City's groundwater at risk of contamination?
Dill City 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 32 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 Dill City's water compare to other cities?
Dill City ranks #157 out of 358 cities in Oklahoma (better than 56% of state cities) and #12147 out of 15744 cities nationally (23th percentile). The grade of C- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Dill City's small water system affect quality?
Dill City's system serves approximately 526 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 32 violations on record.