City water profile

Water hardness in Monticello

Find official utility reports, understand hardness, and check the water system serving your home in Monticello, Iowa.

Utility-reported hardness

Not yet available

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State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 3
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.

Monticello Water Supply

IA5343098 · Groundwater · 4,040 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

Below action level

Reported level: 0.003 mg/L
Action level: 0.015 mg/L

20% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (0)

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

Bacon Addition

IA5343301 · Groundwater · 81 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

Below action level

Reported level: 0.002 mg/L
Action level: 0.015 mg/L

13% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

Violation history (0)

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

Montipark Llc

IA5300688 · 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.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.007 mg/L
Action level: 0.015 mg/L

47% of the listed benchmark

Monitoring period: Jan 1, 2018 to Dec 31, 2020

Violation history (151)

Imported violation history for Montipark Llc
Rule	Status	Period
Nitrate	Archived	Mar 1, 2026 to Mar 31, 2026
Public Notice	Unaddressed	Feb 28, 2026
Public Notice	Unaddressed	Feb 28, 2026
Public Notice	Unaddressed	Jan 28, 2026
Public Notice	Unaddressed	Jan 28, 2026
Nitrate	Archived	Jan 1, 2026 to Jan 31, 2026
Revised Total Coliform Rule	Archived	Jan 1, 2026 to Jan 31, 2026
Public Notice	Unaddressed	Dec 26, 2025
Public Notice	Unaddressed	Dec 26, 2025
Revised Total Coliform Rule	Archived	Dec 1, 2025 to Dec 31, 2025
Nitrate	Archived	Dec 1, 2025 to Dec 31, 2025
Public Notice	Unaddressed	Nov 26, 2025
Public Notice	Unaddressed	Nov 25, 2025
Public Notice	Unaddressed	Nov 25, 2025
Nitrate	Archived	Nov 1, 2025 to Nov 30, 2025
Revised Total Coliform Rule	Archived	Nov 1, 2025 to Nov 30, 2025
Public Notice	Unaddressed	Oct 29, 2025
Public Notice	Unaddressed	Oct 29, 2025
Nitrate	Archived	Oct 1, 2025 to Oct 31, 2025
Revised Total Coliform Rule	Archived	Oct 1, 2025 to Oct 31, 2025
Nitrate	Archived	Sep 1, 2025 to Sep 30, 2025
Revised Total Coliform Rule	Archived	Sep 1, 2025 to Sep 30, 2025
Revised Total Coliform Rule	Archived	Aug 1, 2025 to Aug 31, 2025
Nitrate	Archived	Aug 1, 2025 to Aug 31, 2025
Nitrate	Archived	Jul 1, 2025 to Jul 31, 2025
Consumer Confidence Rule	Unaddressed	Jul 1, 2025
Revised Total Coliform Rule	Archived	Jul 1, 2025 to Jul 31, 2025
Nitrate	Archived	Jun 1, 2025 to Jun 30, 2025
Revised Total Coliform Rule	Archived	Jun 1, 2025 to Jun 30, 2025
Revised Total Coliform Rule	Archived	May 1, 2025 to May 31, 2025
Nitrate	Archived	May 1, 2025 to May 31, 2025
Nitrate	Archived	Apr 1, 2025 to Apr 30, 2025
Revised Total Coliform Rule	Archived	Apr 1, 2025 to Apr 30, 2025
Revised Total Coliform Rule	Archived	Mar 1, 2025 to Mar 31, 2025
Nitrate	Archived	Mar 1, 2025 to Mar 31, 2025
Revised Total Coliform Rule	Archived	Feb 1, 2025 to Feb 28, 2025
Nitrate	Archived	Feb 1, 2025 to Feb 28, 2025
Revised Total Coliform Rule	Archived	Jan 1, 2025 to Jan 31, 2025
Nitrate	Archived	Jan 1, 2025 to Jan 31, 2025
Nitrate	Archived	Dec 1, 2024 to Dec 31, 2024
Revised Total Coliform Rule	Archived	Dec 1, 2024 to Dec 31, 2024
Nitrate	Archived	Nov 1, 2024 to Nov 30, 2024
Revised Total Coliform Rule	Archived	Nov 1, 2024 to Nov 30, 2024
Nitrate	Archived	Oct 1, 2024 to Oct 31, 2024
Revised Total Coliform Rule	Archived	Oct 1, 2024 to Oct 31, 2024
Nitrate	Archived	Sep 1, 2024 to Sep 30, 2024
Revised Total Coliform Rule	Archived	Sep 1, 2024 to Sep 30, 2024
Nitrate	Archived	Aug 1, 2024 to Aug 31, 2024
Revised Total Coliform Rule	Archived	Aug 1, 2024 to Aug 31, 2024
Public Notice	Unaddressed	Jul 22, 2024
Public Notice	Unaddressed	Jul 22, 2024
Revised Total Coliform Rule	Archived	Jul 1, 2024 to Jul 31, 2024
Nitrate	Archived	Jul 1, 2024 to Jul 31, 2024
Public Notice	Unaddressed	Jun 25, 2024
Public Notice	Unaddressed	Jun 25, 2024
Revised Total Coliform Rule	Archived	Jun 1, 2024 to Jun 30, 2024
Lead and Copper Rule	Addressed	Jun 1, 2024
Nitrate	Archived	Jun 1, 2024 to Jun 30, 2024
Public Notice	Unaddressed	May 26, 2024
Public Notice	Unaddressed	May 26, 2024
Nitrate	Archived	May 1, 2024 to May 31, 2024
Revised Total Coliform Rule	Archived	May 1, 2024 to May 31, 2024
Public Notice	Unaddressed	Apr 22, 2024
Public Notice	Unaddressed	Apr 22, 2024
Public Notice	Unaddressed	Apr 7, 2024
Revised Total Coliform Rule	Archived	Apr 1, 2024 to Apr 30, 2024
Nitrate	Archived	Apr 1, 2024 to Apr 30, 2024
Public Notice	Unaddressed	Mar 26, 2024
Revised Total Coliform Rule	Archived	Mar 1, 2024 to Mar 31, 2024
Nitrate	Archived	Mar 1, 2024 to Mar 31, 2024
Public Notice	Unaddressed	Feb 20, 2024
Public Notice	Unaddressed	Feb 20, 2024
Revised Total Coliform Rule	Archived	Feb 1, 2024 to Feb 29, 2024
Nitrate	Archived	Feb 1, 2024 to Feb 29, 2024
Public Notice	Unaddressed	Jan 22, 2024
Public Notice	Unaddressed	Jan 22, 2024
Revised Total Coliform Rule	Archived	Jan 1, 2024 to Jan 31, 2024
Nitrate	Archived	Jan 1, 2024 to Jan 31, 2024
Public Notice	Unaddressed	Dec 25, 2023
Public Notice	Unaddressed	Dec 25, 2023
Nitrate	Archived	Dec 1, 2023 to Dec 31, 2023
Revised Total Coliform Rule	Archived	Dec 1, 2023 to Dec 31, 2023
Public Notice	Unaddressed	Nov 28, 2023
Public Notice	Unaddressed	Nov 28, 2023
Nitrate	Archived	Nov 1, 2023 to Nov 30, 2023
Revised Total Coliform Rule	Archived	Nov 1, 2023 to Nov 30, 2023
Public Notice	Unaddressed	Oct 24, 2023
Public Notice	Unaddressed	Oct 24, 2023
Revised Total Coliform Rule	Archived	Oct 1, 2023 to Oct 31, 2023
Nitrate	Archived	Oct 1, 2023 to Oct 31, 2023
Public Notice	Unaddressed	Sep 26, 2023
Public Notice	Unaddressed	Sep 26, 2023
Nitrate	Archived	Sep 1, 2023 to Sep 30, 2023
Revised Total Coliform Rule	Archived	Sep 1, 2023 to Sep 30, 2023
Public Notice	Unaddressed	Aug 22, 2023
Public Notice	Unaddressed	Aug 22, 2023
Revised Total Coliform Rule	Archived	Aug 1, 2023 to Aug 31, 2023
Total Haloacetic Acids (HAA5)	Archived	Aug 1, 2023 to Aug 31, 2023
TTHM	Archived	Aug 1, 2023 to Aug 31, 2023
Nitrate	Archived	Aug 1, 2023 to Aug 31, 2023
Public Notice	Unaddressed	Jul 24, 2023
Public Notice	Unaddressed	Jul 24, 2023
Public Notice	Unaddressed	Jul 3, 2023
Consumer Confidence Rule	Addressed	Jul 1, 2023
Nitrate	Archived	Jul 1, 2023 to Jul 31, 2023
Revised Total Coliform Rule	Archived	Jul 1, 2023 to Jul 31, 2023
Public Notice	Unaddressed	Jun 20, 2023
Revised Total Coliform Rule	Archived	Jun 1, 2023 to Jun 30, 2023
Nitrate	Archived	Jun 1, 2023 to Jun 30, 2023
Public Notice	Unaddressed	May 21, 2023
Revised Total Coliform Rule	Archived	May 1, 2023 to May 31, 2023
Nitrate	Archived	May 1, 2023 to May 31, 2023
Public Notice	Unaddressed	Apr 24, 2023
Public Notice	Unaddressed	Apr 24, 2023
Public Notice	Unaddressed	Apr 1, 2023
Revised Total Coliform Rule	Archived	Apr 1, 2023 to Apr 30, 2023
Nitrate	Archived	Apr 1, 2023 to Apr 30, 2023
Revised Total Coliform Rule	Archived	Mar 1, 2023 to Mar 31, 2023
Nitrate	Archived	Mar 1, 2023 to Mar 31, 2023
Public Notice	Unaddressed	Feb 21, 2023
Nitrate	Archived	Feb 1, 2023 to Feb 28, 2023
Public Notice	Addressed	Jan 31, 2023
Nitrate	Archived	Jan 1, 2023 to Jan 31, 2023
Revised Total Coliform Rule	Resolved	Jan 1, 2023 to Jan 31, 2023
Public Notice	Addressed	Dec 20, 2022
Revised Total Coliform Rule	Resolved	Dec 1, 2022 to Dec 31, 2022
Nitrate	Archived	Dec 1, 2022 to Dec 31, 2022
Public Notice	Addressed	Nov 22, 2022
Public Notice	Addressed	Nov 22, 2022
Nitrate	Archived	Nov 1, 2022 to Nov 30, 2022
Public Notice	Addressed	Oct 25, 2022
Nitrate	Archived	Oct 1, 2022 to Oct 31, 2022
Public Notice	Addressed	Sep 20, 2022
E. COLI	Addressed	Sep 20, 2022
Public Notice	Addressed	Sep 20, 2022
Public Notice	Addressed	Aug 23, 2022
Public Notice	Addressed	Aug 23, 2022
Revised Total Coliform Rule	Resolved	Aug 1, 2022 to Aug 31, 2022
Nitrate	Resolved	Aug 1, 2022 to Aug 31, 2022
Nitrate	Resolved	Jul 1, 2022 to Jul 31, 2022
Revised Total Coliform Rule	Resolved	Jul 1, 2022 to Jul 31, 2022
Consumer Confidence Rule	Addressed	Jul 1, 2022
Nitrate	Archived	Jun 1, 2022 to Jun 30, 2022
Revised Total Coliform Rule	Resolved	May 1, 2022 to May 31, 2022
Nitrate	Resolved	May 1, 2022 to May 31, 2022
Revised Total Coliform Rule	Resolved	Apr 1, 2022 to Apr 30, 2022
Nitrate	Archived	Apr 1, 2022 to Apr 30, 2022
Consumer Confidence Rule	Resolved	Jul 1, 2021 to Sep 7, 2021
Lead and Copper Rule	Addressed	Jun 1, 2021
Groundwater RuleHealth-based	Resolved	May 1, 2021 to May 31, 2021
Public Notice	Unaddressed	Aug 3, 2019

City summary

What the indexed records say

Monticello has 1 published ZIP profile across Jones County. The regional-evidence median is 259 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

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard1 ZIP

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: 8.5 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 19, 2017 to Jul 24, 2017.

ZIP directory

Water reports in Monticello

Open a ZIP for site-level provenance and measurements.

ZIP code

52310

Very Hard

258.5 PPM

Nearest site: 8.5 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 Iowa communities

Anamosa

Jones County

272 PPM median

Cascade

Jones County

259 PPM median

Center Junction

Jones County

281 PPM median

Martelle

Jones County

272 PPM median

Morley

Jones County

256 PPM median

Olin

Jones County

248 PPM median

Search all 685 Iowa cities →

Questions people ask

About water in Monticello

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.