Johnson, IA

Moderate Risk (41/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.

Environmental data for Johnson in Iowa · Population: 154,881

TRI sites such as Integrated Dna Technologies; Loparex LLC; Procter & Gamble Hair Care LLC; SDWIS systems such as IOWA CITY WATER DEPARTMENT; UNIVERSITY WATER SYSTEM; NORTH LIBERTY WATER SUPPLY anchor Johnson, IA's EPA extract. Derived burden score 41/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Johnson include UNIVERSITY WATER SYSTEM; IOWA CITY REGENCY MOBILE HOME COMMUNITY; COTTAGE RESERVE CORPORATION, while Integrated Dna Technologies leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 83 in 2024.

Burden score 41/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Johnson -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for Johnson, IA: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

+19.9%

6 facilities that filed in 2022 and 2023

Whole inventory

+19.9%

47.6 thousand lb → 57.1 thousand lb, every facility that filed

  • Johnson, IA's total reported releases rose from 47.6 thousand lb in 2022 to 57.1 thousand lb in 2023, based on EPA TRI filings.
  • Johnson, IA's off-site transfers rose from 5.9 thousand lb in 2022 to 29.7 thousand lb in 2023, based on EPA TRI filings.
  • Johnson, IA's air releases fell from 41.7 thousand lb in 2022 to 27.4 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
154,881
TRI Facilities
8
Water Systems
69
Superfund Sites
0
Total Releases
539.4K lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year Good Moderate Unhealthy (SG) Max AQI
2024 259 (71%) 107 0 83
2023 143 (39%) 216 2 210
2022 223 (61%) 141 1 108
2021 172 (47%) 190 2 121
2020 207 (57%) 154 1 105
2024 Good Air Quality: 71% of days
Median AQI: 39

Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in Iowa, see the EPA's AirNow.gov.

Water Systems (69)

System System pop (SDWIS) Violations
IOWA CITY WATER DEPARTMENT 68,753 0
UNIVERSITY WATER SYSTEM 26,684 2
NORTH LIBERTY WATER SUPPLY 23,276 0
CORALVILLE MUNI WATER SYSTEM 22,318 0
TIFFIN WATER SUPPLY 7,577 0
SOLON WATER DEPT 3,018 0
KALONA WATER DEPT 2,630 0
HILLS WATER SUPPLY 863 0
OXFORD WATER SUPPLY 722 0
WEST BRANCH MHP 400 0
RIVER HEIGHTS PROPERTY OWNERS ASSOC. 390 0
PARKVIEW MOBILE HOME COURT 300 0
LAKE CREST MANOR HOA #3 300 0
IOWA CITY MHP LLC 280 0
IOWA CITY REGENCY MOBILE HOME COMMUNITY 225 4
GADDIS ESTATES HOA 220 0
COTTAGE RESERVE CORPORATION 198 1
PARK PLAZA MHP LLC 188 0
NORTH TWIN VIEW HEIGHTS 180 0
IADU CLEAR MHP LLC 173 0
CORALVILLE LAKE MANOR 170 0
SPRING VALLEY HOMEOWNERS ASSN. 163 0
ROYAL OAKS SUBDIVISION 163 1
PRAIRIE VIEW ESTATES ASSOC JOHNSON CNTY 155 0
TWIN VIEW HEIGHTS 155 0
FORESTGATE SUBDIVISION 140 0
LAKE VISTA SUBDIVISION 134 0
LAKEVIEW KNOLLS HOMEOWNERS ASSN. 122 0
RIVERVIEW ESTATES 108 0
LONGVIEW ESTATES HOA (NORTH LIBERTY) 108 0
ROCKLYN MHP 103 0
TWIN VALLEY LAKES IMPROVEMENT ASSN 100 0
WALDENBURG COMMUNITY WATER SYSTEM 90 5
HIDDEN ACRES SUBDIVISION 90 0
FRYTOWN WATER COOP 87 0
MAKADA HOMEOWNERS ASSOCIATION 85 0
LYN-DEN HEIGHTS HOMEOWNERS ASSOC. 84 0
TIMBER TRAILS HOMEOWNERS ASSOCIATION 80 0
FAR HORIZONS SUBDIVISION 80 0
FISHER WELL OWNERS ASSOCIATION 80 0
ORCHARD HEIGHTS SUBDIVISION 78 0
RAPID CREEK RIDGE 70 0
BEYONDER GETAWAY AT SLEEPY HOLLOW 70 0
LAKE MACBRIDE HEIGHTS HOA 69 0
WENDRAM BLUFF HOMES WATER SYSTEM 68 1
WINCHESTER HEIGHTS SUBDIVISION 67 0
TURKEY CREEK DEVELOPMENT 65 0
YANKEE GROVE HOA 64 4
MACBRIDE ESTATES DEVELOPMENT 63 0
INDIAN HILLS HOME OWNERS ASSOCIATION 62 0
LINDSEY ESTATES 62 1
KESSLERS HOMEOWNERS ASSN 60 8
CITY OF KALONA - SOUTHTOWN 60 0
CHERRY HILLS SUBDIVISION 59 0
NORTH CORALVILLE LAKE MANOR 55 0
CUMBERLAND RIDGE FIRST ADDITION 55 0
COUNTRY VIEW SUBDIVISION HOA 55 0
TIMBERLAKE 52 0
WOODS AT HUNTER CREEK (PART 1) 50 0
REDWING ESTATES HOA 48 0
WINDY RIDGE WELL ASSOCIATION 45 0
SUNSET HILLS ESTATES PART 2 45 1
WALDSCHMIDT SUBDIVISION 45 1
WOODLAND RIDGE ESTATES 42 0
THE MEADOWS 35 0
POLK AVENUE WATER ASSOCIATION 28 0
YANKEE GROVE PART 3 25 0
CHAIN RIDGE SUBDIVISION 25 0
MCBRIDE POINTE THIRD MASTER MAINTENANCE 25 51

TRI Facilities (8)

# Facility Total Releases
1 Integrated Dna Technologies 241.1K lbs
2 Loparex LLC 220.8K lbs
3 Procter & Gamble Hair Care LLC 76.6K lbs
4 Hawkeye Ready Mix 500 lbs
5 Bae Systems Information & Electronic Systems Integration I 352 lbs
6 Rockwell Collins Inc Coralville Operations 41 lbs
7 Hubbard Feeds Inc 0 lbs
8 P&g Iowa City Power Oral Care 0 lbs

Cities in Johnson (9)

Iowa City
5 facilities · 15 water
Coralville
3 facilities · 3 water
Oxford
0 facilities · 27 water
Solon
0 facilities · 13 water
Kalona
0 facilities · 5 water
North Liberty
0 facilities · 2 water
Swisher
0 facilities · 2 water
Hills
0 facilities · 1 water
Tiffin
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Johnson, Iowa?
Johnson, IA has an environmental risk score of 41/100 (Moderate Risk), based on 8 TRI facilities, 0 Superfund sites, and 69 water systems on record. 12 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Johnson?
No Superfund National Priorities List (NPL) sites are currently registered in Johnson, IA in the EPA database.
How many toxic release facilities are in Johnson?
Johnson, IA has 8 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 539.4K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Johnson?
In 2024, Johnson, IA recorded a median AQI of 39 and a peak AQI of 83. 71% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Johnson?
Johnson, IA has 69 EPA-regulated water systems. 12 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Johnson?
Environmental compliance in Johnson, Iowa is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Iowa state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro