01The verdict: is Lone Oak water safe?
Lone Oak's drinking water has significant quality concerns based on EPA testing data. With a grade of A- (89.1/100), the system has issues across multiple categories. A water filter is recommended for all residents. The city's 1 water system serves approximately 867 residents using surface water (rivers, lakes, or reservoirs).
8 unresolved violations on record
EPA records show open compliance items for this system. Most are administrative, but unresolved items are worth watching.
See what was cited ↓Lead is well under the limit
90th-percentile lead is 0.0 ppb — beneath the 15 ppb federal action level and under the 5 ppb watch threshold.
See the trend ↓Check back after the next refresh
EPA data updates on a rolling basis; we fold in new samples and violations every month.
Get alerts ↓Lone Oak's drinking water received a grade of A- (89.1 out of 100), indicating good water quality. The city's 1 water system serves approximately 867 residents using purchased surface water.
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 20 violations on record, including 3 health-based violations. 8 remain unresolved.
Lone Oak ranks #62 out of 1067 cities in Texas for water quality, placing it one of the best in the state. The city draws from surface water sources, which are more susceptible to seasonal runoff and agricultural contamination, requiring extensive multi-barrier treatment including coagulation, filtration, and disinfection. As a small community water system, Lone Oak may have fewer resources for advanced treatment technologies and infrastructure upgrades compared to larger utilities.
02What's in Lone Oak's water
Every contaminant flagged in Lone Oak, on one shared scale: distance to its own legal limit. The red line is the limit — anything past it is out of compliance, and the closer a bar gets, the less headroom the system has.
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 |
Cities ranked by 90th-percentile lead PF PFAS in Texas
Cities ranked by compounds detected Cu Copper in Texas
Cities ranked by 90th-percentile copper
03Lone Oak's ten-year track record
Each box is one year. A green check means no EPA violations; a numbered badge counts that year's violations — red if any were health-based, amber if they were monitoring or paperwork issues. The system has 20 violations on record, including 3 health-based violations. 8 remain unresolved.
All ten of the last ten years were clean — no EPA violations recorded for Lone Oak.
▼ Down 1 ppb since 1994. Latest reading: 0 ppb (2025) — 0% of the action level. Sampled at higher-risk homes (90th percentile).
04Where Lone Oak's water comes from
Lone Oak's drinking water comes primarily from surface water sources such as rivers, lakes, or reservoirs.
Purchased Surface Water
Rivers, lakes, or reservoirs — more exposed to runoff, agriculture, and seasonal swings than groundwater.
Wholesale supplier
Multi-barrier treatment: coagulation, sedimentation, filtration, and disinfection to meet EPA standards.
1 system
1 water system, operated under local government ownership.
867 people
Residents served across Lone Oak's service area.
Surface water systems require multi-stage treatment including coagulation, sedimentation, filtration, and disinfection to meet EPA Safe Drinking Water Act standards. These sources can be impacted by seasonal changes, stormwater runoff, upstream agriculture, and industrial discharge. The system is operated by local government ownership and serves approximately 867 people through 1 water system.
| System name | PWSID | Population | Source |
|---|---|---|---|
| CITY OF LONE OAK | TX1160006 | 867 | Purchased Surface Water |
Water bodies near Lone Oak
As a surface-water system, these water bodies may directly influence Lone Oak's drinking water supply.
05Pressure on Lone Oak's watershed
Outside forces that shape what reaches the treatment plant. None of these is a verdict on the tap by itself — but each adds pressure worth knowing about.
Industrial discharge
1 facility within 10 miles reported 0 lb released to surface water in the latest EPA Toxics Release Inventory. Proximity doesn't equal tap contamination — treatment and hydrology decide — but it's pressure on the watershed.
Flood & storm history
2 federal disaster declarations on record for Hunt County. Flooding and severe storms can overwhelm treatment plants, cause sewage overflows, and push runoff into supplies.
06How Lone Oak compares
Scores for nearby Texas cities on one line, with the average marked.
dashed line = Texas average (46/100)
Lone Oak scores 89.1/100 — above the Texas average of 46/100. It outscores 10 of 10 nearby cities. Full Texas rankings →
27.8 / 100FSan Antonio, TX
33.1 / 100FAustin, TX
31.2 / 100FDallas, TX
36.2 / 100FFort Worth, TX
34.5 / 100FEl Paso, TX
35.8 / 100
Compare all cities in the county — grades, violations, and contaminant data side by side.→
07What to do at home
Steps matched to what testing actually found in Lone Oak's water — not generic advice.
A basic carbon filter still helps
Lone Oak's water meets federal standards, but a simple carbon filter improves taste and adds a margin of safety against short-term issues.
Compare tested filters →Read your utility's annual report
Every utility must publish a yearly Consumer Confidence Report with its own testing results. It pairs well with the independent data on this page.
How to read a CCR →Watch for Lone Oak alerts
We refresh EPA data monthly and surface new violations, advisories, and boil-water notices for your county on this page.
All water alerts →Frequently asked questions
Is Lone Oak, TX tap water safe to drink?
Lone Oak's water quality earned a grade of A- (89.1/100). The water generally meets EPA standards and is considered safe for consumption. The city ranks #62 out of 1067 cities tested in Texas.
What contaminants are in Lone Oak's water?
Lead was measured at 0.0 ppb (90th percentile). 20 violations are on record.
How is Lone Oak'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 Lone Oak?
Based on current data, basic filtration should suffice for additional peace of mind.
Where does Lone Oak's water come from?
Lone Oak's water is sourced from Purchased surface water. The city has 1 water system serving approximately 867 residents.
What health violations has Lone Oak's water system had?
Lone Oak has 3 health-based violations on record. The most recent violation was recorded in December 2013. Health-based violations mean the water exceeded EPA maximum contaminant levels (MCLs) for a regulated substance. 8 violations remain unresolved.
How does Lone Oak's water compare to other cities?
Lone Oak ranks #62 out of 1067 cities in Texas (better than 94% of state cities) and #3029 out of 15382 cities nationally (80th percentile). The grade of A- reflects the combined assessment of violation history, lead and copper levels, PFAS contamination, and regulatory compliance.
Does Lone Oak's small water system affect quality?
Lone Oak's system serves approximately 867 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 20 violations on record.