Is Hobbs, NM Tap Water Safe to Drink?
Hobbs tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 5.3 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water. Hobbs also has very hard water at 320 PPM.
Hardness Scale: Where Hobbs Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Hobbs Compares
Hobbs's water is 132% harder than the national average of 138 PPM. It ranks #11 out of 1000 cities in our database (harder than 99% of US cities we track). Within New Mexico, Hobbs has the hardest water out of 9 cities - 54% above the state average of 208 PPM. Among smaller cities, Hobbs ranks #9 of 288 for hardness. At this hardness level, water heaters run an estimated 59% less efficiently due to scale insulation, and major water-using appliances typically last 4 years less than the national average lifespan.
What Hobbs's Water Means for Your Home
Hardness: 320 PPM - Treatment Recommended
Hobbs has some exceptionally hard water. At 320 PPM (18.7 grains per gallon), your tap is loaded with dissolved calcium and magnesium picked up from underground limestone and dolomite formations. Here's the thing: it's perfectly safe to drink. The minerals won't hurt you. But they will hurt your wallet. That adds up. Hard water at 320 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most Hobbs homeowners don't realize it until the plumber shows up. That's 54% harder than the New Mexico average.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. Hobbs has PFOA at 5.3 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
Even though Hobbs draws from groundwater, the treatment process still generates disinfection byproducts: TTHMs at 22 ppb and HAA5 at 6.47 ppb. Groundwater typically needs less treatment than surface water, but when organic compounds are present in the aquifer, chlorination creates the same byproducts. All levels are within legal limits, though above the stricter EWG health guidelines.
Chromium-6 is naturally present in Hobbs's aquifer geology at 1.61 ppb — 80x the EWG health guideline. There's no federal legal limit for chromium-6 specifically (only total chromium), which is why EWG tracks it separately. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
How Hard Water Affects Your Home
At 320 PPM, untreated hard water has measurable effects on household costs and appliance life:
- Water heater inefficiency: Scale insulation forces the heater to work harder (DOE estimates up to 22% more energy for heavily scaled units)
- Soap and detergent: Hard water reduces lathering, requiring significantly more product
- Appliance replacement: Water heaters, dishwashers, and washing machines fail 2-4 years earlier due to scale buildup
- Plumbing maintenance: Scale buildup in pipes reduces flow and requires more frequent service
Note: Impact varies by household size, water usage, and local energy costs. A home water test provides the most accurate assessment for your specific situation.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 320 PPM | < 60 PPM | No federal limit | ⚠ Very Hard |
| Total Dissolved Solids | 420 PPM | < 300 PPM | 500 PPM | ⚠ Elevated |
| PFAS (total) | 35.03 ppt | — | No total limit | Detected |
| ↳ PFOA | 5.3 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1.1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.4 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 4.48 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Hobbs Homes
Our Top Picks for Hobbs (320 PPM)
Hard water at 320 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Recommended Filter for Hobbs
PFAS exceed EPA limits (PFOA: 5.3 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Hobbs
With PFAS at 35.03 ppt in Hobbs's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request City of Hobbs Water's annual Consumer Confidence Report for official city-level data.
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About Hobbs's Water Supply
Water Utility: City of Hobbs Water
Water Source: Ogallala Aquifer (Groundwater)
Population Served: 40,418
Hardness: 320 PPM (18.7 grains per gallon)
Hobbs draws its drinking water from groundwater sources — Ogallala Aquifer. Groundwater typically requires less treatment than surface water because the earth acts as a natural filter. The tradeoff: dissolved minerals from underground rock formations, which is why hardness is elevated here. Calcium and magnesium dissolve into the water as it moves through limestone and dolomite. The system serves 40,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Hobbs Water's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by City of Hobbs Water in Hobbs, NM, including ZIP codes:
79323, 79342, 79355, 79359, 79360, 79376, 79378, 79770, 88114, 88220, 88221, 88231, 88240, 88241, 88242, 88244, 88252, 88255, 88256, 88260, 88262, 88263, 88264, 88265, 88267, 88268
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for Hobbs
At 320 PPM (18.7 GPG), here is how to size a softener for your Hobbs home. Multiply hardness in GPG (18.7) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 18.7 GPG × 200 gal = 3740 grains/day. Over a 7-day regeneration cycle, that is 26,180 grains - a 32,000-grain softener is the right fit for most Hobbs households.
Compare Hobbs to Other New Mexico Cities
Frequently Asked Questions About Hobbs Water
Is Hobbs tap water safe to drink?
Where does Hobbs's water come from?
Do I need a water softener in Hobbs?
How do I remove PFAS from Hobbs tap water?
What water filter is best for Hobbs?
Is Hobbs water safe for babies and infants?
Does Hobbs water damage tankless water heaters?
Do I need both a softener AND a filter in Hobbs?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What Hobbs Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 320 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Hobbs's water data.