Haleakala National Park AQRV's
Haleakala NP has numerous freshwater streams, ponds, and springs, and saltwater bays and coves. Southeasterly winds periodically carry volcanic smog, including sulfur compounds, from Kilauea Volcano to Maui , and freshwater streams and ponds in Haleakala NP may be sensitive to acidification from these compounds. The “Baseline Water Quality Data Inventory and Analysis” (1999) for the park reports numerous pH values of less than 6.5 between 1972 and 1995 in freshwater streams within the park. (Note: EPA’s pH criteria for the protection of freshwater aquatic life is 6.5 to 9.0.) The report does not identify factors contributing to lower pH values.
While there have been no systematic studies, there is currently no information indicating that wildlife in Haleakala NP are being affected by air pollutants.
Dark night skies are considered an important air quality related value at Haleakala NP, possessing value as a cultural, scenic, natural, and scientific resource. Air pollution and poor quality outdoor lighting degrade night skies, lessening a viewer's ability to see stars and other astronomical objects, and altering the nocturnal scene. Use of high quality lighting that produces very little scattered light can greatly improve the night sky. Reduction of haze from air pollution can also improve the night sky.
There is currently no information indicating that soils in Haleakala NP are being affected by air pollutants. However, it is possible that acidic deposition from volcanic smog may contribute to soil acidification.
During southeasterly winds, acidic volcanic smog may affect vegetation in Haleakala NP. Lichens, in particular, are known to be sensitive to the sulfur compounds in volcanic smog.
- Ozone Sensitive Plant Species Listed by Park
- Ozone Sensitive Plant Species on NPS and U.S. FWS Lands
- Ozone Bioindicators on NPS and U.S. FWS Lands
Visibility is a very sensitive AQRV in Haleakala NP. Because the air is generally so clean in the park, just a small amount of pollutant particles can cause a noticeable haze. Volcanic smog from Kilauea Volcano is the most significant cause of visibility impairment.