City water profile

Water hardness in Loudon

Find official utility reports, understand hardness, and check the water system serving your home in Loudon, New Hampshire.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 7
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Freedom Hill/pine Ridge Est

NH1403030 · Groundwater · 370 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Arsenic

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.0129 MG/L
Maximum contaminant level: 0.01 MG/L

129% of the listed benchmark

Monitoring period: Oct 1, 2023 to Dec 31, 2023

Violation history (10)

Imported violation history for Freedom Hill/pine Ridge Est
Rule	Status	Period
ArsenicHealth-based	Resolved	Oct 1, 2023 to Dec 31, 2023
Public Notice	Resolved	Sep 17, 2023 to Sep 20, 2023
Public Notice	Resolved	Aug 23, 2023 to Sep 12, 2023
ArsenicHealth-based	Resolved	Jul 1, 2023 to Sep 30, 2023
Groundwater RuleHealth-based	Resolved	Jul 1, 2023 to Oct 30, 2023
ArsenicHealth-based	Resolved	Apr 1, 2023 to Jun 30, 2023
ArsenicHealth-based	Resolved	Jan 1, 2023 to Mar 31, 2023
ArsenicHealth-based	Resolved	Oct 1, 2022 to Dec 31, 2022
ArsenicHealth-based	Resolved	Jul 1, 2022 to Sep 30, 2022
ArsenicHealth-based	Resolved	Apr 1, 2022 to Jun 30, 2022

Villages At Loudon

NH1402020 · Groundwater · 250 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (0)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Kos Manufactured Housing Cmnty

NH1403010 · Groundwater · 137 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (0)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (1)

Imported violation history for Kos Manufactured Housing Cmnty
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Nov 8, 2023 to Nov 27, 2023

Presidential Pines/upper

NH1403020 · Groundwater · 60 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Arsenic

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.0085 MG/L
Maximum contaminant level: 0.01 MG/L

85% of the listed benchmark

Monitoring period: Apr 1, 2023 to Jun 30, 2023

Violation history (28)

Imported violation history for Presidential Pines/upper
Rule	Status	Period
Arsenic	Resolved	Jan 1, 2024 to Mar 31, 2024
Arsenic	Resolved	Jul 1, 2023 to Sep 30, 2023
ArsenicHealth-based	Archived	Apr 1, 2023 to Jun 30, 2023
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012
Public Notice	Unaddressed	Mar 1, 2012

Presidential Pines/lower

NH1403040 · Groundwater · 51 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level

Reported level: 0.031 mg/L
Action level: 0.015 mg/L

207% of the listed benchmark

Monitoring period: Jan 1, 2007 to Dec 31, 2009

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Voa/nne Senior Housing

NH1402030 · Groundwater · 50 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (0)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

No comparable numerical result available

Federal SDWIS data does not provide a usable numerical result and benchmark for this profile. Missing data is not a pass. Check the serving utility's current Consumer Confidence Report.

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Flintlock Apts

NH1402010 · Groundwater · 30 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Arsenic

EPA SDWIS reported health-based violation

Reported violation

Reported level: 0.011 MG/L
Maximum contaminant level: 0.01 MG/L

110% of the listed benchmark

Monitoring period: Jan 1, 2021 to Mar 31, 2021

Violation history (47)

Imported violation history for Flintlock Apts
Rule	Status	Period
Public Notice	Resolved	Mar 7, 2023 to Mar 31, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Resolved	Mar 7, 2023 to Mar 31, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Public Notice	Unaddressed	Mar 7, 2023
Consumer Confidence Rule	Resolved	Jul 1, 2022 to Aug 11, 2022
Nitrate	Resolved	Jan 1, 2022 to Dec 31, 2022
DICHLOROMETHANE	Archived	Jan 1, 2022 to Dec 31, 2022
trans-1,2-Dichloroethylene	Archived	Jan 1, 2022 to Dec 31, 2022
Tetrachloroethylene	Archived	Jan 1, 2022 to Dec 31, 2022
1,2-Dichloropropane	Archived	Jan 1, 2022 to Dec 31, 2022
CHLOROBENZENE	Archived	Jan 1, 2022 to Dec 31, 2022
Styrene	Archived	Jan 1, 2022 to Dec 31, 2022
Carbon tetrachloride	Archived	Jan 1, 2022 to Dec 31, 2022
1,2,4-Trichlorobenzene	Archived	Jan 1, 2022 to Dec 31, 2022
Trichloroethylene	Archived	Jan 1, 2022 to Dec 31, 2022
Toluene	Archived	Jan 1, 2022 to Dec 31, 2022
Xylenes, Total	Archived	Jan 1, 2022 to Dec 31, 2022
Ethylbenzene	Archived	Jan 1, 2022 to Dec 31, 2022
p-Dichlorobenzene	Archived	Jan 1, 2022 to Dec 31, 2022
1,1-Dichloroethylene	Archived	Jan 1, 2022 to Dec 31, 2022
1,1,1-Trichloroethane	Archived	Jan 1, 2022 to Dec 31, 2022
cis-1,2-Dichloroethylene	Archived	Jan 1, 2022 to Dec 31, 2022
1,2-Dichloroethane	Archived	Jan 1, 2022 to Dec 31, 2022
Benzene	Archived	Jan 1, 2022 to Dec 31, 2022
1,1,2-Trichloroethane	Archived	Jan 1, 2022 to Dec 31, 2022
o-Dichlorobenzene	Archived	Jan 1, 2022 to Dec 31, 2022
Vinyl chloride	Archived	Jan 1, 2022 to Dec 31, 2022
ArsenicHealth-based	Resolved	Jan 1, 2021 to Mar 31, 2021

City summary

What the indexed records say

Loudon has 1 published ZIP profile across Merrimack County. The regional-evidence median is 39 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 1.9 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 24, 2019 to Oct 8, 2019.

ZIP directory

Water reports in Loudon

Open a ZIP for site-level provenance and measurements.

ZIP code

03307

Soft

39.2 PPM

Nearest site: 1.9 mi
Confidence: Low

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other New Hampshire communities

Bradford

Merrimack County

15 PPM median

Concord

Merrimack County

24 PPM median

Franklin

Merrimack County

42 PPM median

Henniker

Merrimack County

42 PPM median

New London

Merrimack County

15 PPM median

Pittsfield

Merrimack County

24 PPM median

Search all 74 New Hampshire cities →

Questions people ask

About water in Loudon

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.