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Local water dashboard

Official source aggregation

Water quality in Oolitic, IN 47451

A source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Lawrence County.

2 reported benchmark flags
Primary matched system
Oolitic Water Works
Source water
Surface water
County
Lawrence County
Profile updated

At a glance

What the current records say

Hardness

Very Hard

242.5 PPM · 14.2 GPG

Compliance screen

No active flag

0 active health-based records

Lead 90th percentile

0 mg/L

0% of action level

Utility match

1 system

Serves 1,315 people system-wide

Hardness meter

How hard is the water?

Very Hard

Estimated local hardness

USGS hardness classification scale

242.5 PPM

Soft
0–59Moderate
60–120Hard
121–180Very hard
181+

Parts per million

242.5

mg/L as CaCO₃ equivalent

Grains per gallon

14.2

1 GPG ≈ 17.1 PPM

What this means at home

At 242.5 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.

USGS sites used

6

Nearest site

61.8 mi

Observation range

Jan 5, 2016–May 28, 2026

Estimate confidence

Low

Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: WHITE RIVER AT HAZLETON, IN (Stream).USGS source documentation ↗

Regional context

Is 47451 typical?

These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.

Oolitic median

243 PPM

About the same

1 indexed ZIP readings · Range 242.5–242.5 PPM

Indiana median

313 PPM

70 PPM lower

472 indexed ZIP readings · Range 132–371 PPM

EPA benchmark screen

Contaminant snapshot

Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.

1 pass2 fail

Lead (PB90)

0 mg/L

Reported Dec 31, 2025

Copper (CU90)

Not available

No numerical 90th-percentile result

Numerical coverage

3 comparable results

Missing values remain blank; absence is not treated as a pass.

Lead (90th percentile)

Measured in mg/L

Pass

Local 0

EPA limit 0.015

Local level is 0% of the listed EPA limit.

TTHM

Measured in UG/L

Fail

Local 83.8

EPA limit 0.08

Local level is 104750% of the listed EPA limit.

Total Haloacetic Acids (HAA5)

Measured in UG/L

Fail

Local 62.3

EPA limit 0.06

Local level is 103833% of the listed EPA limit.

Share of EPA benchmark

100% line = listed limit

EPA SDWIS compliance

Reported violation history

Open EPA source documentation ↗
2026Q2
All records
20
Health-based
12
Active health-based
0
Contaminant or ruleSystemStatusPeriod
Consumer Confidence RuleIN5247005ResolvedOct 1, 2025through Dec 4, 2025
TTHMHealth-basedReported 83.8 UG/L · MCL 0.08IN5247005ResolvedOct 1, 2025through Dec 31, 2025
TTHMHealth-basedReported 81.5 UG/L · MCL 0.08IN5247005ResolvedApr 1, 2025through Jun 30, 2025
Consumer Confidence RuleIN5247005ResolvedJul 1, 2024through Aug 2, 2024
TTHMHealth-basedReported 90.8 UG/L · MCL 0.08IN5247005ResolvedOct 1, 2023through Dec 31, 2023
TTHMHealth-basedReported 89.8 UG/L · MCL 0.08IN5247005ResolvedJul 1, 2023through Sep 30, 2023
Total Haloacetic Acids (HAA5)Health-basedReported 62.3 UG/L · MCL 0.06IN5247005ResolvedJul 1, 2023through Sep 30, 2023
Total Haloacetic Acids (HAA5)Health-basedReported 66 UG/L · MCL 0.06IN5247005ResolvedApr 1, 2023through Jun 30, 2023
TTHMHealth-basedReported 94.8 UG/L · MCL 0.08IN5247005ResolvedApr 1, 2023through Jun 30, 2023
TTHMHealth-basedReported 89.3 UG/L · MCL 0.08IN5247005ResolvedJan 1, 2023through Mar 31, 2023
Total Haloacetic Acids (HAA5)Health-basedReported 61.5 UG/L · MCL 0.06IN5247005ResolvedJan 1, 2023through Mar 31, 2023
Revised Total Coliform RuleIN5247005ResolvedApr 1, 2022through Apr 30, 2022
Revised Total Coliform RuleIN5247005ResolvedMar 1, 2022through Mar 31, 2022
Revised Total Coliform RuleIN5247005ResolvedDec 1, 2021through Dec 31, 2021
Revised Total Coliform RuleIN5247005ResolvedNov 1, 2021through Nov 30, 2021
Total Haloacetic Acids (HAA5)IN5247005ResolvedOct 1, 2021through Dec 31, 2021
TTHMHealth-basedReported 80.3 UG/L · MCL 0.08IN5247005ResolvedOct 1, 2021through Dec 31, 2021
TTHMIN5247005ResolvedOct 1, 2021through Dec 31, 2021
TTHMHealth-basedReported 84.1 UG/L · MCL 0.08IN5247005ResolvedJul 1, 2021through Sep 30, 2021
TTHMHealth-basedReported 89.9 UG/L · MCL 0.08IN5247005ResolvedApr 1, 2021through Jun 30, 2021

No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.

Solutions matcher

Your personalized water action plan

Matched to Oolitic ZIP 47451 using 242.5 PPM nearby hardness and 3 reported measurement benchmarks.

2 matches

Scale protection

High-Capacity Whole House Water Softener

242.5 PPM is 2× the high-hardness trigger used by this matcher.

Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.

Compare whole-house systems

Drinking water protection

Under-Sink Reverse Osmosis System

TTHM, Total Haloacetic Acids (HAA5) have a measured benchmark flag or active health-based SDWIS record in this profile.

A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.

Explore under-sink filtration

Affiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.

Frequently asked

Water questions for Oolitic

Is tap water safe in Oolitic?+

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?+

Nearby USGS observations produce an estimate of 242.5 PPM, or 14.2 grains per gallon, classified as very hard. This is not a household tap measurement.

Do I need a water softener?+

At 242.5 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.