Is La Grande, OR Tap Water Safe to Drink?
Yes, La Grande tap water is safe to drink. Hardness is low at 38 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where La Grande Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How La Grande Compares
La Grande's water is 72% softer than the national average of 138 PPM - ranking in the bottom 77% for hardness nationwide. Most homes here do not need a softener. Within Oregon, it ranks #6 of 48 cities (52% above the state average of 25 PPM). Among smaller cities, La Grande ranks #193 of 288 for hardness.
What La Grande's Water Means for Your Home
Hardness: 38 PPM - Low Concern
La Grande's water is slightly hard at 38 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. La Grande is softer than 77% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Beyond hardness, La Grande's water is within EPA guidelines for regulated contaminants. Chlorine is relatively low at 0.3 mg/L. 4 contaminants exceed EWG's stricter health guidelines, though all are within legal limits.. Want the full picture? Request your utility's annual Consumer Confidence Report for neighborhood-level data.
What's in the Treatment Process
Chromium-6 is naturally present in La Grande's aquifer geology at 0.0524 ppb — 2.6x 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.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 38 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 73 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 0 ppt | — | No total limit | ✓ ND |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1.3 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.3 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.187 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Good news for La Grande residents. Your water quality is generally good. Most homes in this area do not need a water softener. If you have concerns about lead (especially in buildings constructed before 1986) or chlorine taste, a point-of-use filter is the most practical and cost-effective solution.
How to Test Your Water in La Grande
City-wide data is a solid starting point, but your specific tap might differ based on plumbing age, distance from the treatment plant, or seasonal changes.
Free option: Request City of La Grande Water's annual Consumer Confidence Report for official city-level data.
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About La Grande's Water Supply
Water Utility: City of La Grande Water
Water Source: local reservoirs & Grande Ronde River (Groundwater)
Population Served: 13,460
Hardness: 38 PPM (2.2 grains per gallon)
La Grande draws its drinking water from groundwater sources — local reservoirs & Grande Ronde River. 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 mineral content varies by aquifer depth and geology. The geological profile determines hardness, iron, and trace mineral levels. The system serves 13,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of La Grande 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 La Grande Water in La Grande, OR, including ZIP codes:
97814, 97817, 97819, 97820, 97824, 97827, 97828, 97833, 97834, 97837, 97840, 97841, 97845, 97846, 97850, 97856, 97857, 97865, 97867, 97869, 97870, 97876, 97877, 97883, 97884, 97885, 97905, 97908
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare La Grande to Other Oregon Cities
Frequently Asked Questions About La Grande Water
Is La Grande tap water safe to drink?
Where does La Grande's water come from?
Do I need a water softener in La Grande?
What are disinfection byproducts in La Grande's water?
Is chromium-6 in La Grande's water?
Can I drink La Grande tap water straight from the faucet?
How does La Grande compare to the Oregon average?
What water filter is best for La Grande?
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.