Is Riverton, WY Tap Water Safe to Drink?
Riverton tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOS: 7 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water. Riverton also has very hard water at 180 PPM.
Hardness Scale: Where Riverton Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Riverton Compares
Riverton's water is 30% harder than the national average of 138 PPM. It ranks #373 out of 1000 cities in our database (harder than 63% of US cities we track). Within Wyoming, it ranks #5 of 7 cities (7% above the state average of 168 PPM). Among smaller cities, Riverton ranks #90 of 288 for hardness. At this hardness level, water heaters run an estimated 33% less efficiently due to scale insulation, and major water-using appliances typically last 3 years less than the national average lifespan.
What Riverton's Water Means for Your Home
Hardness: 180 PPM - Treatment Recommended
Riverton has some seriously hard water. At 180 PPM (10.5 grains per gallon), your tap is loaded with mineral content carried in from the watershed geology. 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 180 PPM increases household costs through scale-coated water heaters that use more energy, extra soap and detergent, and appliances that wear out faster. Most Riverton homeowners don't realize it until the plumber shows up. That's 7% harder than the Wyoming average.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. Riverton has PFOS at 7 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
Riverton's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 10.7 ppb (13% of the legal limit, but 72x the EWG guideline) and HAA5 at 7.25 ppb (12% of the legal limit, but 73x 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. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
How Hard Water Affects Your Home
At 180 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) | 180 PPM | < 60 PPM | No federal limit | ⚠ Hard |
| Total Dissolved Solids | 319 PPM | < 300 PPM | 500 PPM | ⚠ Elevated |
| PFAS (total) | 125.6 ppt | — | No total limit | Detected |
| ↳ PFOA | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| ↳ PFOS | 7 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 4 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.6 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.00733 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Riverton Homes
Our Top Picks for Riverton (180 PPM)
Hard water at 180 PPM causes scale buildup, increased energy use, and premature appliance failure. A softener protects your plumbing and appliances.
Recommended Filter for Riverton
PFAS exceed EPA limits (PFOS: 7 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
Quick Fix for Chlorine: Shower Filter
At 1.6 mg/L chlorine, many Riverton 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 Riverton
With PFAS at 125.6 ppt in Riverton'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 Riverton Water's annual Consumer Confidence Report for official city-level data.
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About Riverton's Water Supply
Water Utility: City of Riverton Water
Water Source: Wind River & wells (Surface Water)
Population Served: 10,330
Hardness: 180 PPM (10.5 grains per gallon)
Riverton's drinking water comes from surface sources — Wind River & wells. 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. Despite the treatment process, mineral hardness from the watershed carries through. The system serves 10,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Riverton 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 Riverton Water in Riverton, WY, including ZIP codes:
82310, 82322, 82401, 82430, 82433, 82443, 82501, 82510, 82512, 82513, 82514, 82515, 82516, 82520, 82523, 82524, 82630, 82638, 82642, 82649, 82923, 82925, 82941, 83115
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Water Softener Sizing for Riverton
At 180 PPM (10.5 GPG), here is how to size a softener for your Riverton home. Multiply hardness in GPG (10.5) by daily water usage (roughly 50 gallons per person). A family of four uses about 200 gallons/day: 10.5 GPG × 200 gal = 2100 grains/day. Over a 7-day regeneration cycle, that is 14,700 grains - a 32,000-grain softener is the right fit for most Riverton households.
Compare Riverton to Other Wyoming Cities
Frequently Asked Questions About Riverton Water
Is Riverton tap water safe to drink?
Where does Riverton's water come from?
Do I need a water softener in Riverton?
How do I remove PFAS from Riverton tap water?
What water filter is best for Riverton?
Is Riverton water safe for babies and infants?
Does Riverton water damage tankless water heaters?
Do I need both a softener AND a filter in Riverton?
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 Riverton Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 180 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Riverton's water data.