California dairymen may soon see an increased cost of doing business in the state, due to a proposed reclassification of the ozone level in the San Joaquin Valley, reports the Turlock Journal.

The Environmental Protection Agency (EPA) could reclassify the San Joaquin Valley’s ozone level from “serious” to “extreme.”

According to the article, more than 600 farms, including dairies, would be affected.

The reclassification would directly impact dairy farms. Currently, a farm that produces 25 tons of nitrogen or volatile organic compound emissions are required to obtain air-pollution permits. This is approximately 1,000 cows. The new classification would lower the level to 10 tons of emissions, affecting dairy farms with less than 500 cows.

If the EPA moves forward, the new classification could start in September.

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Source: Turlock Journal