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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Matched to what EPA's records actually show for KENAI WATER SYSTEM (grade A, 90/100) — not to what sells.
EPA SDWIS/ECHO 2026Q2 · UCMR5 (2023–2026, July 2026 release) · SYR4 six-year review 2012–2019 · Full Kenai water quality report · Methodology
Reverse osmosis for arsenic. KENAI WATER SYSTEM's 2012–2019 compliance samples show arsenic averaging above 80% of the EPA limit or exceeding it in at least one sample. Carbon pitchers and faucet filters do not remove arsenic; reverse osmosis (or contaminant-specific media) does.
Based on EPA records for KENAI WATER SYSTEM, yes: reverse osmosis for arsenic is the first fix (see the evidence table above).
Reverse osmosis (NSF/ANSI 58). It is the only common household technology that removes arsenic.
KENAI WATER SYSTEM's latest Lead and Copper Rule 90th-percentile result was 0 ppb (2021-01-01 to 2023-12-31), below the 15 ppb action level. Lead enters from service lines and home plumbing, so test at the tap if your home is older.
No. None of the 58 UCMR5 PFAS results for KENAI WATER SYSTEM (2024-04-09 to 2024-10-07) were at or above the reporting limit.
Look for: NSF/ANSI 58 with the specific reduction claim
KENAI WATER SYSTEM's 2012–2019 compliance samples show arsenic averaging above 80% of the EPA limit or exceeding it in at least one sample. Carbon pitchers and faucet filters do not remove arsenic; reverse osmosis (or contaminant-specific media) does.
| Evidence | Result | EPA limit | Period | Source |
|---|---|---|---|---|
| Arsenic | 19.84 ug/L (average of 12 samples) | 10 ug/L | 2012–2019 | EPA SYR4 six-year review |
Look for: Certified drinking-water lab
Utility data describes water leaving KENAI WATER SYSTEM. Lead, copper and some PFAS enter between the main and your faucet, so a mail-in lab test is the only way to know what your household actually drinks — and the cheapest way to avoid buying a filter you do not need.
Rows are the contaminants EPA data actually flags for Kenai. ✓ removes (when certified) · ◐ only specific certified models or media · ✗ does not remove.
| Removes | Pitcher | Under-sink carbon | Reverse osmosis |
|---|---|---|---|
| Arsenic | ✗ | ◐ | ✓ |
| Chlorine taste and odor | ✓ | ✓ | ✓ |
| Typical cost | typically $25–$50 + filters | typically $40–$150 | typically $150–$400 |
| Install | none (renters) | under the sink, ~15 min | under sink + faucet; drain line |
| Certification to look for | NSF/ANSI 42 / 53 | NSF/ANSI 42 / 53 | NSF/ANSI 58 |
| Verified picks | ZeroWater 10-cup · Brita Elite · Waterdrop pitchers | Waterdrop TSA · Waterdrop 10UA | APEC ROES-50 · Waterdrop tankless RO |
Cost ranges are typical retail prices, not quotes. Removal marks describe the filter class when certified for that contaminant — always check the NSF/ANSI listing of the exact cartridge. Full pitcher vs under-sink vs faucet comparison →
A filter is only certified up to its rated capacity — breakthrough happens when a cartridge runs past it. Budget the cartridges, not just the unit.
| Filter | Change interval | Annual cartridge cost | Replacements |
|---|---|---|---|
| Reverse osmosis (APEC ROES-50) | typically pre-filters every 6–12 months, RO membrane every 2–3 years, post-carbon yearly | typically $50–$90 | Replacement RO filter sets → |
| Under-sink carbon block (Waterdrop TSA / 10UA) | typically every 6–12 months (rated 8,000 gal or 12 months) | typically $30–$60 | Replacement under-sink cartridges → |
| Pitcher (ZeroWater / Brita Elite) | typically every 2–6 months (ZeroWater 20–40 gal depending on TDS; Brita Elite 120 gal ≈ 6 months) | typically $60–$150 | Replacement pitcher filters → |
Amazon Subscribe & Save ships cartridges on the interval you choose at a small recurring discount, which is the easiest way to keep a certified filter within its rated life. Costs are typical retail figures, not quotes; check the capacity printed on your exact cartridge.
A point-of-use (under-sink) system typically runs $200-$600 installed; whole-house treatment $1,000-$3,000+ depending on flow and what has to come out. Tell us where you are and a certified water-treatment installer serving Kenai will follow up - no obligation.
Historical monitoring (2012–2019) shows arsenic near or above the EPA limit in Kenai.
Best for Arsenic Removal
APEC Reverse Osmosis System
Reverse osmosis removes arsenic to safe levels — the EPA-recommended treatment for arsenic (carbon pitchers don't remove it).
Check Price on AmazonCompare direct from Waterdrop
Filters rated for arsenic reduction
Waterdrop's arsenic collection — arsenic needs RO-class treatment, and these are the systems built for it.
Shop Filters Rated for Arsenic →Whole-Home Filtration System
Whole-house system — treats every tap at the source
For consistently poor water, a whole-home system filters every faucet, shower, and appliance — the permanent, install-once fix that goes beyond a single point-of-use filter.
Explore Whole-Home SystemsNot sure what filter you need?
Test your tap water first, so you filter for what's actually in it.
Shop Home Water Test Kits →We may earn a commission from Amazon and Waterdrop when you purchase through our links, at no extra cost to you.
Affiliate links (Amazon, Waterdrop, Tap Score): we may earn a commission at no extra cost to you. Recommendations are matched to EPA findings, not to commission rates.