New Hampshire

• Hillsborough County
• Boston-Worcester-Manchester, MA-RI-NH

If you live in Hillsborough County, the air you breathe needs your support.

Ozone

Particle Pollution 24-hour

Particle Pollution Annual

You can make a difference in the air that you breathe.

Tell your member of Congress to protect your health: Don’t weaken the Clean Air Act.

Tell us why having healthy air matters to you.

Tell your friends about the air where you live.

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High Ozone Days		Learn More
Ozone Grade:	D	How is my grade calculated?
Weighted Average:	3.0	Change Since 1996: 8.7 3.0 fewer days this year
View Orange, Red, and Purple Ozone Days Orange Ozone Days: 9 What do the colors mean? Red Ozone Days: 0 What do the colors mean? Purple Ozone Days: 0 What do the colors mean?
Particle Pollution - 24 Hour		Learn More
Grade:	A	How is my grade calculated?
Weighted Average:	0.0	Change Since 2000: 0.5 0.0 fewer days this year
View Orange, Red, and Purple Particle Pollution Days Orange Particle Days: 0 What do the colors mean? Red Particle Days: 0 What do the colors mean? Purple Particle Days: 0 What do the colors mean?
Particle Pollution - Annual		Learn More
Grade:	Pass	How is my grade calculated?
Design Value	8.4	Change Since 2002: 10.3 8.4 µg/m3
Groups At Risk		Learn More
Total Population:	400,721	Risks to the population
Pediatric Asthma:	8,089	Risks to people with Asthma
Adult Asthma:	31,919	Risks to people with Asthma
Chronic Bronchitis:	13,333	Risks to people with Chronic Bronchitis
Emphysema:	5,735	Risks to people with Emphysema
Cardiovascular Disease:	101,161	Risks to people with Cardiovascular Disease
Diabetes:	23,439	Risks to people with Diabetes
Children Under 18:	94,082	Risks to children and teens
Adults 65 & Over:	47,527	Risks to older adults
Poverty Estimate:	29,996	Risks to people with low incomes

Hillsborough

33011

D

9

0

0

A

0.0

0

0

0

Pass

8.4

400721

94082

47527

8089

31919

13333

5735

274

101161

23439

29996

8.7

9.7

6.8

8.5

11

13

11

8.3

7.3

9.8

8

6.3

3.0

0.5

0.5

0.8

1.7

1

1

0.7

0.3

0.0

0

0

10.3

10.2

0

10

9.6

9.1

8.4

The air you breathe needs your support.

You can make a difference in the air that you breathe.

Tell your member of Congress to protect your health: Don’t weaken the Clean Air Act.

Tell us why having healthy air matters to you.

Tell your friends about the air where you live.

• Email
• Facebook
• Twitter

Worcester	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	worcester-25027.html	25027	5.2	F	14	1	0	A	0.0	0	0	0		Pass	9.4	798552	187231	102035	16967	63245	26616	11682	565	203243	45660	84142	9	13.5	12	9.7	9.8	11.5	9.3	6.7	5.3	11.2	11.3	11	5.2	1.8	2.8	2.5	3	1.7	1.3	0.7	0.3	0.0	12.2	0	0	0	11.3	11.3	10.7	10.3	9.4
Washington	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	washington-44009.html	44009	2.7	D	8	0	0	DNC	0	0	0	0		Dnc	0	126979	25491	19017	2975	11021	4533	2091	96	35464	8385	10676	0	9.5	9.3	14.8	17	18.7	13.5	10.3	10.5	11.7	8.7	4.5	2.7	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Suffolk	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	suffolk-25025.html	25025	1.7	C	5	0	0	B	0.3	1	0	0		Pass	10.5	722023	126275	75726	11443	62861	23558	8833	509	165378	36477	153514	3.3	7.7	7.3	9.8	12.7	13.5	10.3	6.2	6.3	6.3	3.7	3	1.7	3	4.7	4.3	5.3	3.7	4.3	2	1.3	0.3	0	0	13	13.9	13.1	12.2	11.4	11.1	10.5
Rockingham	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	rockingham-33015.html	33015	2.3	D	7	0	0	B	0.3	1	0	0		Pass	7.4	295223	67438	37424	5798	23381	10179	4535	202	78819	18243	16560	12.8	14.5	9.7	11.3	13.5	14.5	10.3	4.8	5.2	6.8	6.2	4.8	2.3	0.3	0.3	0.3	1.3	0.7	0.3	0	0	0.3	0	0	9.5	9.2	9	8.8	8.6	8	7.4
Providence	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	providence-44007.html	44007	2.7	D	8	0	0	B	0.7	2	0	0		Pass	9.6	626667	137625	84389	16064	53513	20914	9140	473	158421	37096	105124	7.3	7.7	6.7	11.8	18.3	18.7	12.5	5.8	5	7.8	6.8	5.5	2.7	1.8	2.8	2.5	3.7	2.3	2.7	1	0.7	0.7	11.3	11.6	12.6	12.4	12	12	11.4	10.5	9.6
Plymouth	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	plymouth-25023.html	25023	0	DNC	0	0	0	A	0.0	0	0	0		Pass	8.6	494919	119475	68846	10827	38632	16750	7673	349	130703	29538	40062	0	0	0	0	0	0	0	0	0	0	0	0	0	0.7	1.3	1.3	1	0.3	0.7	0.3	0.3	0.0	0	11.2	10.5	10.1	9.8	9.6	9.3	9.2	8.6
Norfolk	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	norfolk-25021.html	25021	3.0	D	9	0	0	DNC	0	0	0	0		Dnc	0	670850	152132	97304	13786	53462	22968	10535	473	178803	40469	41207	0	0	0	0	0	0	16.8	9.8	9.7	12.2	8.3	7	3.0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Middlesex	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	middlesex-25017.html	25017	2.0	C	6	0	0	A	0.0	0	0	0		Pass	8.2	1503085	320439	197015	29038	122691	50825	22078	1061	385027	86482	118584	14.3	17.7	14	13	13	13.2	7	4	4	7.7	5.7	5.7	2.0	0.5	0	0	0	0	0	0	0	0.0	0	0	0	0	0	0	8.7	8.6	8.2
Merrimack	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	merrimack-33013.html	33013	0.3	B	1	0	0	B	0.7	2	0	0		Pass	8.5	146445	31946	20008	2747	11789	5083	2290	100	39394	9187	13282	2.8	2.8	2	2.2	3.8	4.2	4	2.3	1.7	2	1	1	0.3	0.3	0.3	0.7	1	0.7	0.3	0.3	0.3	0.7	0	9.6	0	0	9.7	9.7	9.3	8.9	8.5
Kent	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	kent-44003.html	44003	1.3	C	4	0	0	A	0.0	0	0	0		Pass	6.6	166158	34254	26069	3998	14303	5924	2784	125	46692	11080	16716	13.3	14.2	12	16.5	20.7	19	12.5	8.2	7	8.8	5.3	4	1.3	0.8	0.8	0.5	0.7	0.3	0.7	0.3	0.3	0.0	9	0	8.3	0	0	0	7.7	7.3	6.6
Essex	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	essex-25009.html	25009	3.3	F	10	0	0	A	0.0	0	0	0		Pass	8.5	743159	172089	105083	15594	58859	25285	11535	524	196523	44423	76128	13.3	14.5	10.8	13.3	18.5	21	15.8	10.2	8.7	12.7	9.3	8.7	3.3	1.3	2.3	2.3	2.3	1.3	1	0.7	0	0.0	0	0	0	9.3	9.7	9.4	9.1	9	8.5
Bristol	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	bristol-25005.html	25005	3.3	F	10	0	0	A	0.0	0	0	0		Pass	8.3	548285	122409	77879	11093	43997	18655	8433	387	144029	32546	68247	19.7	20	15.8	20.3	19	21.7	13.7	11.3	8.5	7	5.3	2.7	3.3	0.8	0.8	0.8	0.7	0.7	0.3	0.3	0	0.0	0	0	0	10.2	9.5	9.1	8.8	8.8	8.3
Belknap	Boston-Worcester-Manchester, MA-RI-NH	Boston-Worcester-Manchester-MA-RI-NH.html	belknap-33001.html	33001	0.3	B	1	0	0	A	0.0	0	0	0		Pass	5.8	60088	12481	10057	1073	4810	2187	1062	41	17552	4139	5626	1.3	1.7	0	0	0	5.2	4	3.3	2	2	1	1	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0	0	0.0	0	0	7.2	7.3	7.3	7.2	6.8	6.3	5.8

Ranked 45 for high ozone days out of 277 metropolitan areas Ranked 90 for 24-hour particle pollution out of 277 metropolitan areas Ranked 109 for annual particle pollution out of 277 metropolitan areas Take Action | Support Clean Air | Local Air Quality Contact Your Local Lung Association: Massachusetts, New Hampshire, Rhode Island Compare Your Air Select Your State Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming Select your City Albany, GA Albany-Corvallis-Lebanon, OR Albany-Schenectady-Amsterdam, NY Albuquerque, NM Alexandria, LA 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Killeen-Temple-Fort Hood, TX Knoxville-Sevierville-La Follette, TN Kokomo-Peru, IN La Crosse, WI-MN Lafayette-Acadiana, LA Lafayette-Frankfort, IN Lake Charles-Jennings, LA Lake Havasu City-Kingman, AZ Lakeland-Winter Haven, FL Lancaster, PA Lansing-East Lansing-Owosso, MI Laredo, TX Las Cruces, NM Las Vegas-Paradise-Pahrump, NV Lawton, OK Lewiston, ID-WA Lexington-Fayette--Frankfort--Richmond, KY Lima-Van Wert-Wapakoneta, OH* Lincoln, NE Little Rock-North Little Rock-Pine Bluff, AR Logan, UT-ID Longview-Marshall, TX Los Angeles-Long Beach-Riverside, CA Louisville-Jefferson County-Elizabethtown-Scottsburg, KY-IN Lubbock-Levelland, TX Lumberton-Laurinburg, NC Lynchburg, VA Macon-Warner Robins-Fort Valley, GA Madison-Baraboo, WI McAllen-Edinburg-Pharr, TX Medford, OR Memphis, TN-MS-AR Merced, CA Miami-Fort Lauderdale-Pompano Beach, FL Midland-Odessa, TX Milwaukee-Racine-Waukesha, WI Minneapolis-St. Paul-St. Cloud, MN-WI Missoula, MT Mobile-Daphne-Fairhope, AL Modesto, CA Monroe-Bastrop, 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Falls, NY Rockford-Freeport-Rochelle, IL Rocky Mount, NC Rome, GA Sacramento--Arden-Arcade--Yuba City, CA-NV Saginaw-Bay City-Saginaw Township North, MI Salem, OR Salinas, CA Salisbury-Ocean Pines, MD Salt Lake City-Ogden-Clearfield, UT San Antonio-New Braunfels, TX San Diego-Carlsbad-San Marcos, CA San Jose-San Francisco-Oakland, CA San Luis Obispo-Paso Robles, CA Santa Barbara-Santa Maria-Goleta, CA Santa Fe-Espanola, NM Sarasota-Bradenton-Punta Gorda, FL Savannah-Hinesville-Fort Stewart, GA Scranton--Wilkes-Barre, PA Seattle-Tacoma-Olympia, WA Sheboygan, WI Shreveport-Bossier City-Minden, LA Sioux City-Vermillion, IA-NE-SD Sioux Falls, SD South Bend-Elkhart-Mishawaka, IN-MI Spokane, WA Springfield, IL Springfield, MA Springfield, MO St. George, UT St. Joseph, MO-KS St. Louis-St. Charles-Farmington, MO-IL State College, PA Steubenville-Weirton, OH-WV Stockton, CA Syracuse-Auburn, NY Tallahassee, FL Tampa-St. Petersburg-Clearwater, FL Terre Haute, IN Texarkana, TX-Texarkana, AR Toledo-Fremont, OH Topeka, KS Tucson, AZ Tulsa-Bartlesville, OK Tuscaloosa, AL Tyler-Jacksonville, TX Utica-Rome, NY Valdosta, GA Victoria, TX Virginia Beach-Norfolk-Newport News, VA-NC Visalia-Porterville, CA Waco, TX Washington-Baltimore-Northern Virginia, DC-MD-VA-WV Waterloo-Cedar Falls, IA Wausau-Merrill, WI Wenatchee-East Wenatchee, WA Wheeling, WV-OH Wichita-Winfield, KS Williamsport-Lock Haven, PA Wilmington, NC Yakima, WA York-Hanover-Gettysburg, PA Youngstown-Warren-East Liverpool, OH-PA Yuma, AZ
High Ozone Days	Learn More
	Change Since This County: Hillsborough, NH Other counties with monitors in this metropolitan area There are no other counties in this metropolitan area What is my length? 14 Belknap, NH Bristol, MA Essex, MA Kent, RI Merrimack, NH Middlesex, MA Norfolk, MA Plymouth, MA Providence, RI Rockingham, NH Suffolk, MA Washington, RI Worcester, MA A B C D F DNC INC
Particle Pollution - 24 Hour	Learn More
	Change Since This County: Hillsborough, NH Other counties with monitors in this metropolitan area There are no other counties in this metropolitan area Belknap, NH Bristol, MA Essex, MA Kent, RI Merrimack, NH Middlesex, MA Norfolk, MA Plymouth, MA Providence, RI Rockingham, NH Suffolk, MA Washington, RI Worcester, MA A B C D F DNC INC
Particle Pollution - Annual	Learn More
	Change Since This County: Hillsborough, NH Other counties with monitors in this metropolitan area There are no other counties in this metropolitan area Belknap, NH Bristol, MA Essex, MA Kent, RI Merrimack, NH Middlesex, MA Norfolk, MA Plymouth, MA Providence, RI Rockingham, NH Suffolk, MA Washington, RI Worcester, MA PASS FAIL DNC INC

Groups At Risk		Learn More
Total Population:		Risks to the population
Pediatric Asthma:		Risks to people with Asthma
Adult Asthma:		Risks to people with Asthma
Chronic Bronchitis:		Risks to people with Chronic Bronchitis
Emphysema:		Risks to people with Emphysema
Cardiovascular Disease:		Risks to people with Cardiovascular Disease
Diabetes:		Risks to people with Diabetes
Children Under 18:		Risks to children and teens
Adults 65 & Over:		Risks to older adults
Poverty Estimate:		Risks to people with low incomes

Notes:

(1) INC indicates incomplete monitoring data for all three years. Therefore, those counties are excluded from the grade analysis.
(2) DNC indicates that there is no monitor collecting data in the county.

More about Methodology.