Is Forest Grove, OR Tap Water Safe to Drink?
Yes, Forest Grove tap water is safe to drink. Hardness is low at 25 PPM, and no contaminants exceed health guidelines. Most homes here don't need treatment.
Hardness Scale: Where Forest Grove Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Forest Grove Compares
Forest Grove's water is 82% softer than the national average of 138 PPM - ranking in the bottom 88% for hardness nationwide. Most homes here do not need a softener. Within Oregon, it ranks #19 of 48 cities (0% below the state average of 25 PPM). Among smaller cities, Forest Grove ranks #236 of 288 for hardness.
What Forest Grove's Water Means for Your Home
Hardness: 25 PPM - Low Concern
Forest Grove's water is slightly hard at 25 PPM. Most households won't notice any issues at this level. Scale buildup is minimal, and a water softener would be overkill. Forest Grove is softer than 87% of US cities. If you're thinking about water treatment, contaminant filtration is where to focus your money, not softening.
Contaminants & Safety
Disinfection byproducts are the notable finding here. Forest Grove's water has TTHMs at 24.7 ppb and HAA5 at 27.4 ppb — both within legal limits, but the EWG health guidelines are far stricter. These byproducts form when chlorine reacts with organic matter during treatment. A whole-house activated carbon filter reduces both chlorine and its byproducts. Want the full picture? Request your utility's annual Consumer Confidence Report.
What's in the Treatment Process
Forest Grove's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 24.7 ppb (31% of the legal limit, but 165x the EWG guideline) and HAA5 at 27.4 ppb (46% of the legal limit, but 274x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.486 ppb, which is 24x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. 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) | 25 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 41 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 | 2.9 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.185 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Good news for Forest Grove 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.
Quick Fix for Chlorine: Shower Filter
At 1 mg/L chlorine, many Forest Grove residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in Forest Grove
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 Forest Grove Light & Power's annual Consumer Confidence Report for official city-level data.
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About Forest Grove's Water Supply
Water Utility: Forest Grove Light & Power
Water Source: Hagg Lake & Barney Reservoir (Surface Water)
Population Served: 26,838
Hardness: 25 PPM (1.5 grains per gallon)
Forest Grove's drinking water comes from surface sources — Hagg Lake & Barney Reservoir. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 27,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Forest Grove Light & Power'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 Forest Grove Light & Power in Forest Grove, OR, including ZIP codes:
97106, 97107, 97109, 97116, 97117, 97118, 97119, 97125, 97133, 97134, 97136, 97141, 97143, 97144
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Forest Grove to Other Oregon Cities
Frequently Asked Questions About Forest Grove Water
Is Forest Grove tap water safe to drink?
Where does Forest Grove's water come from?
Do I need a water softener in Forest Grove?
What are disinfection byproducts in Forest Grove's water?
Is chromium-6 in Forest Grove's water?
Why does Forest Grove water taste like chlorine?
Can I drink Forest Grove tap water straight from the faucet?
What water filter is best for Forest Grove?
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 Forest Grove Homeowners Actually Buy
Common purchases for homes with 25 PPM water.
Affiliate disclosure: we may earn a commission. Selection based on Forest Grove's water data.