Alton Tap Water Quality Report
Warning on lead alone: EPA's lead-and-copper record for ALTON WATER WORKS lists a 90th-percentile lead result of 210 ppb, above the 15 ppb action level. No other test results are on file for ALTON WATER WORKS. Check ALTON WATER WORKS's latest Consumer Confidence Report for its current test results.
People Served
1,800
Health-based violations since 2020
2
ALTON WATER WORKS. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Is Alton Tap Water Safe to Drink?
Everything we hold on Alton's water is below — a thin record, not a clean one. Testing your own water is the way to find out what your tap is actually delivering.
ALTON WATER WORKS, Alton's water system, serves 1,800 people. 2 other systems also serve parts of Alton. Each system's results are listed under its own name, never added to ALTON WATER WORKS's.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in New Hampshire
Alton Water Service Areas
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Recommended Water Filters for Alton
Based on Alton's water quality data, these NSF-certified filters are recommended to reduce lead (its water system's EPA lead 90th percentile is above the 15 ppb action level).
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Whirlpool Corporation
W11256135
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.7 gpm
Removes 19 contaminants:
+14 more
Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Tetrachloroethylene, Toxaphene, Turbidity
Whirlpool Corporation
W11569861
NSF Certified:
Capacity
1001 gal
Filter Life
3 mo
Flow Rate
0.52 gpm
Removes 22 contaminants:
+17 more
Atrazine, Benzene, Carbofuran, Chlorine (Free), Chlorine (Total), Chlorine Dioxide, Chlorobenzene, Cryptosporidium, Ethylbenzene, Lead, Mercury, Metolachlor, Styrene, Tetrachloroethylene, Toxaphene, Trichloroethylene, Turbidity
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
No test results on file — test your own tap
We don't hold water-quality results for this system yet, so nobody can tell you what is in your water from published data. A certified lab test is the way to find out.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Alton's water readings can explain
We publish a city-level hardness figure for Alton, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Alton? Public-water results do not apply to private wells. See Belknap County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Alton
Alton's tap water has an estimated 2.0 grains per gallon (34.0 mg/L, county sampling in Belknap County) — soft on the USGS scale, below the range where scale is usually worth treating.
Water softener cost for an estimated 2.0 gpg water in Alton — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For New Hampshire as a whole, read water softener cost in New Hampshire — priced against the plumber wage published for the state.
Frequently Asked Questions About Alton Tap Water
Warning on lead alone: EPA's lead-and-copper record for ALTON WATER WORKS lists a 90th-percentile lead result of 210 ppb, above the 15 ppb action level. No other test results are on file for ALTON WATER WORKS. Check ALTON WATER WORKS's latest Consumer Confidence Report for its current test results.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach ALTON WATER WORKS. For a problem with your water now (discolored water, no water, low pressure, a leak), contact ALTON WATER WORKS directly.
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