Utility-reported hardness
Unavailable
Ask your provider or test your tap
Local water dashboard
Official source aggregationWater quality in Monticello, IA 52310
Regional hardness evidence, possible serving systems, EPA compliance history, and the measurements that are—and are not—available for Jones County.
No active health-based violation reported
- Largest possible serving system
- Monticello Water Supply
- Source water
- Groundwater
- County
- Jones County
- Profile updated
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 →At a glance
What the current records say
EPA quarter 2026Q2
All possible systems
No active flag
0 active health-based records
Measurements by utility
Each result belongs to a specific system.
Utility match
3 systems
Serves 4,040 people system-wide
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
- 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
- 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
- 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)
| 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 |
Hardness meter
What does nearby environmental evidence show?
258.5
PPM as CaCO₃
Very Hard
PPM
258.5
GPG
15.1
Regional environmental evidence
USGS hardness classification scale
258.5 PPM
Soft
0–60Moderate
61–120Hard
121–180Very hard
181+
0–60Moderate
61–120Hard
121–180Very hard
181+
Parts per million
258.5
mg/L as CaCO₃ equivalent
Grains per gallon
15.1
1 GPG ≈ 17.1 PPM
How to use regional evidence
These samples describe nearby environmental water. They cannot establish whether your tap water is soft or hard. Use a utility result or a tap test for appliance settings and treatment sizing.
USGS sites used
2
Nearest site
8.5 mi
Observation range
Jul 19, 2017–Jul 24, 2017
Regional evidence confidence
Low
Median of the latest source-type-aligned hardness observation at each monitoring site within 25 miles. Nearest monitoring location: 084N04W02DBBB 31624 1990Anamosa 5 (Well).USGS source documentation ↗Evidence tier: Regional environmental evidence. This value is not used as proof of the serving utility's treated-water hardness.
Regional context
Is 52310 typical?
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Monticello median
259 PPM
About the same1 indexed ZIP readings · Range 258.5–258.5 PPM
Iowa median
281 PPM
22 PPM lower443 indexed ZIP readings · Range 101–729.5 PPM
Evidence-first next steps
Confirm the problem before choosing treatment
This profile can help you ask the right question. It cannot select equipment for a property without a current result from the serving utility or the tap.
Confirm the serving system
ZIP boundaries and utility service areas do not perfectly match. Verify the system on a water bill before relying on system-wide records.
Read the current utility report
Use the current Consumer Confidence Report for treated-water results and official notices.
Find an official utility report →Test for the decision you face
Use a tap hardness test before sizing a softener. For health concerns, use a certified laboratory and the correct sampling protocol.
Convert your hardness test result →Frequently asked
Water questions for Monticello
Is tap water safe in Monticello?+
EPA ECHO shows no active health-based violation for the associated systems in this reporting snapshot. This does not prove every contaminant is absent; federal records can lag and household plumbing can change tap conditions.
How hard is the water?+
Utility-reported hardness is unavailable in this index. Regional samples do not establish tap-water hardness. Ask your provider or test your tap.
Do I need a water softener?+
Confirm hardness at your tap and consider actual scale or spotting before choosing treatment. Regional environmental values cannot determine whether you need a softener. A softener addresses hardness, not every contaminant.