TRI Reporter
Clean Air Act
Clean Water Act
RCRA
MAUI ELECTRIC CO (MECO) - MAALAEA GENERATING STATION
Quick Summary
- •Released 61,862 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
- •Assessed $235,400 in total penalties since records began.
- •Reports releases of chemicals classified as known or probable carcinogens.
- Address
-
1000 NORTH KIHEI ROAD
KIHEI, HI 96753
View on map ↗ - County
- MAUI County
- Industry
- Utilities
- NAICS (North American Industry Classification)
- 221112
- Inspections
- 5 · last Sep 16, 2025
- Total Penalties
- $235,400 · last Jul 28, 2022
- Registry ID
- 110010385528
How This Compares
#11
of 36 TRI reporters in HI
#301
of 584 TRI reporters in Utilities
Ranked by most recent year's total TRI releases.
TRI Toxic Chemical Releases
Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.
Emissions Trend (2015–2024)
-37% overall
| Year | Total Releases (lbs) | vs Prior Year |
|---|---|---|
| 2015 | 125,405 | — |
| 2016 | 121,533 | -3% |
| 2017 | 61,862 | -49% |
| 2018 | 65,624 | +6% |
| 2019 | 259 | -100% |
| 2020 | 80,147 | +30893% |
| 2021 | 81,958 | +2% |
| 2022 | 93,431 | +14% |
| 2023 | 83,236 | -11% |
| 2024 | 79,559 | -4% |
2024
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 48,000 | 48,000 | — | — | — | |
| Ammonia | 31,000 | 31,000 | — | — | — | |
| Naphthalene | 330 | 330 | — | — | 197 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 167 | 167 | — | — | 0 | ♦ Carcinogen |
| Lead compounds | 59 | 56 | — | 3 | — | |
| Benzo[g,h,i]perylene | 3 | 3 | — | — | — |
2023
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 47,000 | 47,000 | — | — | — | |
| Ammonia | 35,600 | 35,600 | — | — | — | |
| Naphthalene | 370 | 370 | — | — | — | ♦ Carcinogen |
| Polycyclic aromatic compounds | 195 | 195 | — | — | — | ♦ Carcinogen |
| Lead compounds | 68 | 66 | — | 2 | — | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
2022
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 57,000 | 57,000 | — | — | — | |
| Ammonia | 35,800 | 35,800 | — | — | — | |
| Naphthalene | 360 | 360 | — | — | 12 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 197 | 197 | — | — | — | ♦ Carcinogen |
| Lead compounds | 70 | 67 | — | 3 | — | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
2021
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 48,000 | 48,000 | — | — | — | |
| Ammonia | 33,400 | 33,400 | — | — | — | |
| Naphthalene | 330 | 330 | — | — | 8 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 166 | 166 | — | — | — | ♦ Carcinogen |
| Lead compounds | 59 | 56 | — | 3 | — | |
| Benzo[g,h,i]perylene | 3 | 3 | — | — | — |
2020
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 50,000 | 50,000 | — | — | — | |
| Ammonia | 29,600 | 29,600 | — | — | — | |
| Naphthalene | 340 | 340 | — | — | 2 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 148 | 148 | — | — | — | ♦ Carcinogen |
| Lead compounds | 56 | 49 | — | 7 | — | |
| Benzo[g,h,i]perylene | 3 | 3 | — | — | — |
2019
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Polycyclic aromatic compounds | 191 | 191 | — | — | 0 | ♦ Carcinogen |
| Lead compounds | 68 | 64 | — | 4 | — |
2018
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Ammonia | 36,000 | 36,000 | — | — | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 29,000 | 29,000 | — | — | — | |
| Naphthalene | 350 | 350 | — | — | 287 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 201 | 201 | — | — | 1 | ♦ Carcinogen |
| Lead compounds | 70 | 68 | — | 2 | 0 | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
2017
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Ammonia | 36,200 | 36,200 | — | — | — | |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 25,000 | 25,000 | — | — | — | |
| Naphthalene | 400 | 400 | — | — | 151 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 185 | 185 | — | — | 0 | ♦ Carcinogen |
| Lead compounds | 74 | 73 | — | 0 | — | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
2016
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 84,000 | 84,000 | — | — | — | |
| Ammonia | 36,880 | 36,880 | — | — | — | |
| Naphthalene | 380 | 380 | — | — | 132 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 193 | 193 | — | — | — | ♦ Carcinogen |
| Lead compounds | 76 | 76 | — | 1 | — | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
2015
| Chemical | Total (lbs) | Air | Water | Land | Off-Site | |
|---|---|---|---|---|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 87,000 | 87,000 | — | — | — | |
| Ammonia | 37,740 | 37,740 | — | — | — | |
| Naphthalene | 380 | 380 | — | — | 6 | ♦ Carcinogen |
| Polycyclic aromatic compounds | 202 | 202 | — | — | — | ♦ Carcinogen |
| Lead compounds | 78 | 78 | — | — | — | |
| Benzo[g,h,i]perylene | 4 | 4 | — | — | — |
Waste Management & Recycling
How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.
| Chemical | Released | Recycled | Energy Recovery | Treated |
|---|---|---|---|---|
| Polycyclic aromatic compounds | — | — | 0 | — |
| Naphthalene | — | — | 197 | — |
Off-Site Transfer Destinations
Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.
| Destination | Chemical | Disposal | Recycling | Energy Rec. | Treatment |
|---|---|---|---|---|---|
|
MAUI ELECTRIC CO LTD, KAHULUI GENERATING STATION
KAHULUI, HI
|
Polycyclic aromatic compounds | — | — | 0 | — |
|
BURLINGTON ENVIRONMENTAL INC
KENT, WA
|
Naphthalene | — | — | 7 | — |
|
MAUI ELECTRIC CO LTD, KAHULUI GENERATING STATION
KAHULUI, HI
|
Naphthalene | — | — | 190 | — |
Compliance Violations
Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.
| Program | Type | Violation Date | Return to Compliance | Status |
|---|---|---|---|---|
| caa | FRV | Jul 28, 2022 | — | Open |
| caa | FRV | Jul 28, 2022 | — | Open |
| caa | FRV | Feb 19, 2019 | — | Open |
| rcra | EPA Administered Permit Programs: the HW Permit Program General Information | Jul 9, 2012 | Mar 4, 2013 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jul 9, 2012 | Mar 4, 2013 | Resolved |
| rcra | Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators | Jul 9, 2012 | Mar 4, 2013 | Resolved |
| rcra | Standards Applicable to Generators of HW: General | Jun 14, 2001 | Aug 22, 2001 | Resolved |
Discharge Limit Exceedances
Instances where this facility's reported discharge monitoring results exceeded its permitted limits under the Clean Water Act. Exceedance percentage shows how far over the permit limit the discharge was.
| Pollutant | Violation | Reported | Limit | Exceedance | Period | Status |
|---|---|---|---|---|---|---|
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.23 mg/L | 0.01 | +3,667% | Dec 2018 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.01 | +1,700% | Dec 2018 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.19 mg/L | 0.02 | +759% | Dec 2018 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.27 mg/L | 0.52 | +144% | Dec 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 1.62 mg/L | 0.18 | +800% | Dec 2018 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.96 mg/L | 0.18 | +436% | Dec 2018 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 1.37 mg/L | 0.02 | +6,127% | Dec 2018 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 2.12 mg/L | 0.52 | +308% | Dec 2018 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.86 mg/L | 0.52 | +258% | Dec 2017 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.95 mg/L | 0.09 | +960% | Dec 2017 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.97 mg/L | 0.18 | +441% | Dec 2017 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.96 mg/L | 0.52 | +277% | Dec 2017 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.19 mg/L | 0.10 | +91% | Dec 2017 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.20 mg/L | 0.01 | +3,300% | Dec 2017 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 2.76 mg/L | 0.38 | +626% | Dec 2017 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.35 mg/L | 0.02 | +1,477% | Dec 2017 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.33 mg/L | 0.01 | +5,433% | Dec 2017 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 1.39 mg/L | 0.18 | +672% | Dec 2017 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.70 mg/L | 0.02 | +3,091% | Dec 2017 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 2.40 mg/L | 0.02 | +10,809% | Dec 2016 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.28 mg/L | 0.52 | +146% | Dec 2016 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.37 mg/L | 0.52 | +163% | Dec 2016 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.04 mg/L | 0.01 | +617% | Dec 2016 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.85 mg/L | 0.18 | +370% | Dec 2016 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.91 mg/L | 0.09 | +908% | Dec 2016 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.51 mg/L | 0.38 | +297% | Dec 2016 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.10 | +11% | Dec 2016 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.07 mg/L | 0.02 | +205% | Dec 2016 | Open |
| Nickel, total recoverable | DMR, Limited - Numeric Violation | 0.01 mg/L | 0.01 | +140% | Dec 2016 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.06 | +61% | Dec 2016 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.92 mg/L | 0.38 | +405% | Dec 2016 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.32 mg/L | 0.06 | +437% | Dec 2016 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.88 mg/L | 0.09 | +878% | Dec 2016 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.68 mg/L | 0.18 | +276% | Dec 2016 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.10 mg/L | 0.01 | +1,517% | Dec 2016 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.08 mg/L | 0.38 | +184% | Dec 2015 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 0.76 mg/L | 0.52 | +45% | Dec 2015 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.14 mg/L | 0.10 | +40% | Dec 2015 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 1.60 mg/L | 0.02 | +7,173% | Dec 2015 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.06 mg/L | 0.06 | +3% | Dec 2015 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.05 mg/L | 0.01 | +783% | Dec 2015 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.28 mg/L | 0.18 | +56% | Dec 2015 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.50 mg/L | 0.09 | +454% | Dec 2015 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.11 mg/L | 0.06 | +75% | Dec 2015 | Open |
| Zinc, total recoverable | DMR, Limited - Numeric Violation | 0.20 mg/L | 0.02 | +809% | Dec 2015 | Open |
| Phosphorus, total [as P] | DMR, Limited - Numeric Violation | 0.16 mg/L | 0.10 | +55% | Dec 2015 | Open |
| Nitrite + Nitrate total [as N] | DMR, Limited - Numeric Violation | 0.39 mg/L | 0.09 | +332% | Dec 2015 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 1.28 mg/L | 0.52 | +146% | Dec 2015 | Open |
| Copper, total recoverable | DMR, Limited - Numeric Violation | 0.09 mg/L | 0.01 | +1,467% | Dec 2015 | Open |
| Nitrogen, total [as N] | DMR, Limited - Numeric Violation | 0.87 mg/L | 0.38 | +129% | Dec 2015 | Open |
Enforcement Actions
Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.
Administrative - Formal
Clean Air Act
· Case 3604605524 · Jul 28, 2022
$235,400
Notice of Violation
Clean Air Act
· Case 3601871588 · Feb 19, 2019
Administrative - Formal
Clean Air Act
· Case 3604604033 · Feb 19, 2019
$19,900
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-HID981656333-001 · Aug 6, 2001
WRITTEN INFORMAL
RCRA (Hazardous Waste)
· Case RCRA-HID981656333-002 · Aug 6, 2001
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